64670975 has 18 divisors (see below), whose sum is σ = 85196184. Its totient is φ = 48688000.

The previous prime is 64670939. The next prime is 64670993. The reversal of 64670975 is 57907646.

It is not a de Polignac number, because 64670975 - 2⁸ = 64670719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2750 + ... + 11700.

Almost surely, 2^64670975 is an apocalyptic number.

64670975 is a deficient number, since it is larger than the sum of its proper divisors (20525209).

64670975 is a wasteful number, since it uses less digits than its factorization.

64670975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8995 (or 8973 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 64670975 is about 8041.8265959917. The cubic root of 64670975 is about 401.3930077752.

The spelling of 64670975 in words is "sixty-four million, six hundred seventy thousand, nine hundred seventy-five".