64999974 has 32 divisors (see below), whose sum is σ = 140765184. Its totient is φ = 19890720.

The previous prime is 64999943. The next prime is 64999981. The reversal of 64999974 is 47999946.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12717 + ... + 17079.

It is an arithmetic number, because the mean of its divisors is an integer number (4398912).

Almost surely, 2^64999974 is an apocalyptic number.

64999974 is an abundant number, since it is smaller than the sum of its proper divisors (75765210).

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

64999974 is a wasteful number, since it uses less digits than its factorization.

64999974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4572.

The product of its digits is 4408992, while the sum is 57.

The square root of 64999974 is about 8062.2561358468. The cubic root of 64999974 is about 402.0725222492.

The spelling of 64999974 in words is "sixty-four million, nine hundred ninety-nine thousand, nine hundred seventy-four".