66725604 has 36 divisors (see below), whose sum is σ = 184002000. Its totient is φ = 20219760.

The previous prime is 66725579. The next prime is 66725623. The reversal of 66725604 is 40652766.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 83854 + ... + 84645.

Almost surely, 2^66725604 is an apocalyptic number.

It is an amenable number.

66725604 is an abundant number, since it is smaller than the sum of its proper divisors (117276396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66725604 is a wasteful number, since it uses less digits than its factorization.

66725604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168520 (or 168515 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 66725604 is about 8168.5741717879. The cubic root of 66725604 is about 405.5995874323.

The spelling of 66725604 in words is "sixty-six million, seven hundred twenty-five thousand, six hundred four".