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66986328 = 2332791097
BaseRepresentation
bin1111111110001…
…0000101011000
311200001020222010
43333202011120
5114122030303
610351425520
71442242263
oct377420530
9150036863
1066986328
11348a2902
121a5252a0
1310b54ba6
148c79cda
155d32c03
hex3fe2158

66986328 has 16 divisors (see below), whose sum is σ = 167465880. Its totient is φ = 22328768.

The previous prime is 66986321. The next prime is 66986351. The reversal of 66986328 is 82368966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66986321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1395525 + ... + 1395572.

Almost surely, 266986328 is an apocalyptic number.

It is an amenable number.

66986328 is an abundant number, since it is smaller than the sum of its proper divisors (100479552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66986328 is a wasteful number, since it uses less digits than its factorization.

66986328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791106 (or 2791102 counting only the distinct ones).

The product of its digits is 746496, while the sum is 48.

The square root of 66986328 is about 8184.5175789414. The cubic root of 66986328 is about 406.1271815554.

The spelling of 66986328 in words is "sixty-six million, nine hundred eighty-six thousand, three hundred twenty-eight".

Divisors: 1 2 3 4 6 8 12 24 2791097 5582194 8373291 11164388 16746582 22328776 33493164 66986328