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30366661 = 1312971801
BaseRepresentation
bin111001111010…
…1101111000101
32010010210020011
41303311233011
530233213121
63002510221
7516053353
oct163655705
963123204
1030366661
1116160a16
12a205371
1363a2b50
1440667d3
1529ec7e1
hex1cf5bc5

30366661 has 8 divisors (see below), whose sum is σ = 32745944. Its totient is φ = 27993600.

The previous prime is 30366659. The next prime is 30366671. The reversal of 30366661 is 16666303.

It can be written as a sum of positive squares in 4 ways, for example, as 3648100 + 26718561 = 1910^2 + 5169^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 7-Lehmer number, since φ(30366661) divides (30366661-1)7.

It is a cyclic number.

It is not a de Polignac number, because 30366661 - 21 = 30366659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30366631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15961 + ... + 17761.

It is an arithmetic number, because the mean of its divisors is an integer number (4093243).

Almost surely, 230366661 is an apocalyptic number.

It is an amenable number.

30366661 is a deficient number, since it is larger than the sum of its proper divisors (2379283).

30366661 is a wasteful number, since it uses less digits than its factorization.

30366661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3111.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 30366661 is about 5510.5953398884. The cubic root of 30366661 is about 311.9840180560.

The spelling of 30366661 in words is "thirty million, three hundred sixty-six thousand, six hundred sixty-one".

Divisors: 1 13 1297 1801 16861 23413 2335897 30366661