66610572 has 24 divisors (see below), whose sum is σ = 177628416. Its totient is φ = 19031568.

The previous prime is 66610549. The next prime is 66610589. The reversal of 66610572 is 27501666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396408 + ... + 396575.

It is an arithmetic number, because the mean of its divisors is an integer number (7401184).

Almost surely, 2^66610572 is an apocalyptic number.

It is an amenable number.

66610572 is an abundant number, since it is smaller than the sum of its proper divisors (111017844).

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

66610572 is a wasteful number, since it uses less digits than its factorization.

66610572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792997 (or 792995 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 66610572 is about 8161.5300036206. The cubic root of 66610572 is about 405.3663747616.

The spelling of 66610572 in words is "sixty-six million, six hundred ten thousand, five hundred seventy-two".