66996125 has 32 divisors (see below), whose sum is σ = 99740160. Its totient is φ = 43929600.

The previous prime is 66996101. The next prime is 66996131. The reversal of 66996125 is 52169966.

It is a de Polignac number, because none of the positive numbers 2^k-66996125 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18461 + ... + 21789.

It is an arithmetic number, because the mean of its divisors is an integer number (3116880).

Almost surely, 2^66996125 is an apocalyptic number.

It is an amenable number.

66996125 is a deficient number, since it is larger than the sum of its proper divisors (32744035).

66996125 is a wasteful number, since it uses less digits than its factorization.

66996125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3374 (or 3364 counting only the distinct ones).

The product of its digits is 174960, while the sum is 44.

The square root of 66996125 is about 8185.1160651514. The cubic root of 66996125 is about 406.1469797947.

The spelling of 66996125 in words is "sixty-six million, nine hundred ninety-six thousand, one hundred twenty-five".