74865681 has 32 divisors (see below), whose sum is σ = 127372800. Its totient is φ = 42981840.

The previous prime is 74865677. The next prime is 74865691. The reversal of 74865681 is 18656847.

It is a happy number.

74865681 is a `hidden beast` number, since 7 + 4 + 86 + 568 + 1 = 666.

It is not a de Polignac number, because 74865681 - 2² = 74865677 is a prime.

It is a super-2 number, since 2×74865681² = 11209740383187522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74865601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 991 + ... + 12276.

It is an arithmetic number, because the mean of its divisors is an integer number (3980400).

Almost surely, 2^74865681 is an apocalyptic number.

It is an amenable number.

74865681 is a deficient number, since it is larger than the sum of its proper divisors (52507119).

74865681 is a wasteful number, since it uses less digits than its factorization.

74865681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13306 (or 13300 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 74865681 is about 8652.4956515447. The cubic root of 74865681 is about 421.4644288063.

The spelling of 74865681 in words is "seventy-four million, eight hundred sixty-five thousand, six hundred eighty-one".