64716975 has 84 divisors (see below), whose sum is σ = 124418376. Its totient is φ = 33359040.

The previous prime is 64716947. The next prime is 64716991. The reversal of 64716975 is 57961746.

It is a happy number.

It is not a de Polignac number, because 64716975 - 2¹⁷ = 64585903 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 64716975.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 965892 + ... + 965958.

Almost surely, 2^64716975 is an apocalyptic number.

64716975 is a deficient number, since it is larger than the sum of its proper divisors (59701401).

64716975 is an equidigital number, since it uses as much as digits as its factorization.

64716975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 128 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 64716975 is about 8044.6861343374. The cubic root of 64716975 is about 401.4881545408.

The spelling of 64716975 in words is "sixty-four million, seven hundred sixteen thousand, nine hundred seventy-five".