65665875 has 32 divisors (see below), whose sum is σ = 119208960. Its totient is φ = 31836000.

The previous prime is 65665871. The next prime is 65665877. The reversal of 65665875 is 57856656.

It is not a de Polignac number, because 65665875 - 2² = 65665871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65665871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3835 + ... + 12084.

It is an arithmetic number, because the mean of its divisors is an integer number (3725280).

Almost surely, 2^65665875 is an apocalyptic number.

65665875 is a deficient number, since it is larger than the sum of its proper divisors (53543085).

65665875 is a wasteful number, since it uses less digits than its factorization.

65665875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15948 (or 15938 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 48.

The square root of 65665875 is about 8103.4483400587. The cubic root of 65665875 is about 403.4408887549.

The spelling of 65665875 in words is "sixty-five million, six hundred sixty-five thousand, eight hundred seventy-five".