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33668947081 = 7211223832
BaseRepresentation
bin11111010110110100…
…110101110010001001
310012220110001201121001
4133112310311302021
51022423222301311
623244534215001
72301230220400
oct372664656211
9105813051531
1033668947081
1113308274300
1266377b4461
1332375356c3
1418b5824637
15d20ca94c1
hex7d6d35c89

33668947081 has 27 divisors (see below), whose sum is σ = 43068214413. Its totient is φ = 26224533720.

The previous prime is 33668947063. The next prime is 33668947157. The reversal of 33668947081 is 18074986633.

It is a happy number.

The square root of 33668947081 is 183491.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 33668947081 - 29 = 33668946569 is a prime.

It is a super-2 number, since 2×336689470812 (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33668947181) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 14127616 + ... + 14129998.

Almost surely, 233668947081 is an apocalyptic number.

33668947081 is the 183491-st square number.

33668947081 is the 91746-th centered octagonal number.

It is an amenable number.

33668947081 is a deficient number, since it is larger than the sum of its proper divisors (9399267332).

33668947081 is an frugal number, since it uses more digits than its factorization.

33668947081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4802 (or 2401 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 33668947081 in words is "thirty-three billion, six hundred sixty-eight million, nine hundred forty-seven thousand, eighty-one".

Divisors: 1 7 11 49 77 121 539 847 2383 5929 16681 26213 116767 183491 288343 1284437 2018401 5678689 14128807 39750823 62465579 278255761 437259053 687121369 3060813371 4809849583 33668947081