857664375 has 20 divisors (see below), whose sum is σ = 1428986328. Its totient is φ = 457420000.

The previous prime is 857664341. The next prime is 857664407. The reversal of 857664375 is 573466758.

It is not a de Polignac number, because 857664375 - 2²² = 853470071 is a prime.

It is a super-3 number, since 3×857664375³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 226836 + ... + 230585.

Almost surely, 2^857664375 is an apocalyptic number.

857664375 is a deficient number, since it is larger than the sum of its proper divisors (571321953).

857664375 is an equidigital number, since it uses as much as digits as its factorization.

857664375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457444 (or 457429 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 51.

The square root of 857664375 is about 29285.9074470982. The cubic root of 857664375 is about 950.1068670176.

The spelling of 857664375 in words is "eight hundred fifty-seven million, six hundred sixty-four thousand, three hundred seventy-five".