64686875 has 30 divisors (see below), whose sum is σ = 89099604. Its totient is φ = 46560000.

The previous prime is 64686857. The next prime is 64686917. The reversal of 64686875 is 57868646.

It is a happy number.

It is not a de Polignac number, because 64686875 - 2¹⁰ = 64685851 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 666827 + ... + 666923.

Almost surely, 2^64686875 is an apocalyptic number.

64686875 is a deficient number, since it is larger than the sum of its proper divisors (24412729).

64686875 is an frugal number, since it uses more digits than its factorization.

64686875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 113 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 50.

The square root of 64686875 is about 8042.8151166118. The cubic root of 64686875 is about 401.4259005624.

It can be divided in two parts, 6 and 4686875, that multiplied together give a triangular number (28121250 = T₇₄₉₉).

The spelling of 64686875 in words is "sixty-four million, six hundred eighty-six thousand, eight hundred seventy-five".