66974212 has 12 divisors (see below), whose sum is σ = 118128640. Its totient is φ = 33223176.

The previous prime is 66974207. The next prime is 66974213. The reversal of 66974212 is 21247966.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (66974213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65412 + ... + 66427.

Almost surely, 2^66974212 is an apocalyptic number.

It is an amenable number.

66974212 is a deficient number, since it is larger than the sum of its proper divisors (51154428).

66974212 is a wasteful number, since it uses less digits than its factorization.

66974212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131970 (or 131968 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 66974212 is about 8183.7773674508. Note that the first 3 decimals coincide. The cubic root of 66974212 is about 406.1026943017.

The spelling of 66974212 in words is "sixty-six million, nine hundred seventy-four thousand, two hundred twelve".