74431665 has 48 divisors (see below), whose sum is σ = 160857216. Its totient is φ = 30931200.

The previous prime is 74431633. The next prime is 74431673. The reversal of 74431665 is 56613447.

It is a happy number.

It is not a de Polignac number, because 74431665 - 2⁵ = 74431633 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7276 + ... + 14205.

It is an arithmetic number, because the mean of its divisors is an integer number (3351192).

Almost surely, 2^74431665 is an apocalyptic number.

It is an amenable number.

74431665 is an abundant number, since it is smaller than the sum of its proper divisors (86425551).

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

74431665 is a wasteful number, since it uses less digits than its factorization.

74431665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21510 (or 21507 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 74431665 is about 8627.3788023942. The cubic root of 74431665 is about 420.6484032307.

The spelling of 74431665 in words is "seventy-four million, four hundred thirty-one thousand, six hundred sixty-five".