66602972 has 24 divisors (see below), whose sum is σ = 119836080. Its totient is φ = 32376960.

The previous prime is 66602971. The next prime is 66602989. The reversal of 66602972 is 27920666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66602971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20183 + ... + 23249.

It is an arithmetic number, because the mean of its divisors is an integer number (4993170).

Almost surely, 2^66602972 is an apocalyptic number.

It is an amenable number.

66602972 is a deficient number, since it is larger than the sum of its proper divisors (53233108).

66602972 is a wasteful number, since it uses less digits than its factorization.

66602972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3221 (or 3219 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 66602972 is about 8161.0643913646. The cubic root of 66602972 is about 405.3509572809.

The spelling of 66602972 in words is "sixty-six million, six hundred two thousand, nine hundred seventy-two".