65657065 has 32 divisors (see below), whose sum is σ = 87552000. Its totient is φ = 47044800.

The previous prime is 65657063. The next prime is 65657083. The reversal of 65657065 is 56075656.

It is not a de Polignac number, because 65657065 - 2¹ = 65657063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65657063) 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, 329836 + ... + 330034.

It is an arithmetic number, because the mean of its divisors is an integer number (2736000).

Almost surely, 2^65657065 is an apocalyptic number.

It is an amenable number.

65657065 is a deficient number, since it is larger than the sum of its proper divisors (21894935).

65657065 is a wasteful number, since it uses less digits than its factorization.

65657065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397.

The product of its (nonzero) digits is 189000, while the sum is 40.

The square root of 65657065 is about 8102.9047260843. The cubic root of 65657065 is about 403.4228455262.

The spelling of 65657065 in words is "sixty-five million, six hundred fifty-seven thousand, sixty-five".