66893972 has 12 divisors (see below), whose sum is σ = 119555520. Its totient is φ = 32735256.

The previous prime is 66893969. The next prime is 66893987. The reversal of 66893972 is 27939866.

It is a self number, because there is not a number n which added to its sum of digits gives 66893972.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177722 + ... + 178097.

It is an arithmetic number, because the mean of its divisors is an integer number (9962960).

Almost surely, 2^66893972 is an apocalyptic number.

It is an amenable number.

66893972 is a deficient number, since it is larger than the sum of its proper divisors (52661548).

66893972 is a wasteful number, since it uses less digits than its factorization.

66893972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355870 (or 355868 counting only the distinct ones).

The product of its digits is 979776, while the sum is 50.

The square root of 66893972 is about 8178.8735165669. The cubic root of 66893972 is about 405.9404492563.

The spelling of 66893972 in words is "sixty-six million, eight hundred ninety-three thousand, nine hundred seventy-two".