66500925 has 24 divisors (see below), whose sum is σ = 111049440. Its totient is φ = 35112000.

The previous prime is 66500909. The next prime is 66500939. The reversal of 66500925 is 52900566.

It is not a de Polignac number, because 66500925 - 2⁴ = 66500909 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3186 + ... + 11964.

It is an arithmetic number, because the mean of its divisors is an integer number (4627060).

Almost surely, 2^66500925 is an apocalyptic number.

It is an amenable number.

66500925 is a deficient number, since it is larger than the sum of its proper divisors (44548515).

66500925 is a wasteful number, since it uses less digits than its factorization.

66500925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8893 (or 8888 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 66500925 is about 8154.8099303417. The cubic root of 66500925 is about 405.1438294212.

The spelling of 66500925 in words is "sixty-six million, five hundred thousand, nine hundred twenty-five".