66902972 has 12 divisors (see below), whose sum is σ = 117339600. Its totient is φ = 33377376.

The previous prime is 66902963. The next prime is 66902989. The reversal of 66902972 is 27920966.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16472 + ... + 20127.

It is an arithmetic number, because the mean of its divisors is an integer number (9778300).

Almost surely, 2^66902972 is an apocalyptic number.

It is an amenable number.

66902972 is a deficient number, since it is larger than the sum of its proper divisors (50436628).

66902972 is a wasteful number, since it uses less digits than its factorization.

66902972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37060 (or 37058 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 66902972 is about 8179.4236960803. The cubic root of 66902972 is about 405.9586536879.

The spelling of 66902972 in words is "sixty-six million, nine hundred two thousand, nine hundred seventy-two".