66904125 has 32 divisors (see below), whose sum is σ = 116183808. Its totient is φ = 34126400.

The previous prime is 66904121. The next prime is 66904127. The reversal of 66904125 is 52140966.

It is not a de Polignac number, because 66904125 - 2² = 66904121 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66904121) 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, 4747 + ... + 12503.

It is an arithmetic number, because the mean of its divisors is an integer number (3630744).

Almost surely, 2^66904125 is an apocalyptic number.

It is an amenable number.

66904125 is a deficient number, since it is larger than the sum of its proper divisors (49279683).

66904125 is a wasteful number, since it uses less digits than its factorization.

66904125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7798 (or 7788 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 66904125 is about 8179.4941775149. The cubic root of 66904125 is about 405.9609857598.

The spelling of 66904125 in words is "sixty-six million, nine hundred four thousand, one hundred twenty-five".