66456025 has 12 divisors (see below), whose sum is σ = 83400912. Its totient is φ = 52522640.

The previous prime is 66456017. The next prime is 66456067. The reversal of 66456025 is 52065466.

It is not a de Polignac number, because 66456025 - 2³ = 66456017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13939 + ... + 18088.

It is an arithmetic number, because the mean of its divisors is an integer number (6950076).

Almost surely, 2^66456025 is an apocalyptic number.

It is an amenable number.

66456025 is a deficient number, since it is larger than the sum of its proper divisors (16944887).

66456025 is a wasteful number, since it uses less digits than its factorization.

66456025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32120 (or 32115 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 66456025 is about 8152.0564890094. The cubic root of 66456025 is about 405.0526274140.

The spelling of 66456025 in words is "sixty-six million, four hundred fifty-six thousand, twenty-five".