64750625 has 20 divisors (see below), whose sum is σ = 81461424. Its totient is φ = 51450000.

The previous prime is 64750619. The next prime is 64750627. The reversal of 64750625 is 52605746.

It is a de Polignac number, because none of the positive numbers 2^k-64750625 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64750627) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 131630 + ... + 132120.

Almost surely, 2^64750625 is an apocalyptic number.

It is an amenable number.

64750625 is a deficient number, since it is larger than the sum of its proper divisors (16710799).

64750625 is an equidigital number, since it uses as much as digits as its factorization.

64750625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722 (or 707 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 64750625 is about 8046.7773052322. Note that the first 3 decimals coincide. The cubic root of 64750625 is about 401.5577279180.

The spelling of 64750625 in words is "sixty-four million, seven hundred fifty thousand, six hundred twenty-five".