66694972 has 12 divisors (see below), whose sum is σ = 117850096. Its totient is φ = 33023520.

The previous prime is 66694951. The next prime is 66695017. The reversal of 66694972 is 27949666.

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, 80529 + ... + 81352.

Almost surely, 2^66694972 is an apocalyptic number.

It is an amenable number.

66694972 is a deficient number, since it is larger than the sum of its proper divisors (51155124).

66694972 is a wasteful number, since it uses less digits than its factorization.

66694972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161988 (or 161986 counting only the distinct ones).

The product of its digits is 979776, while the sum is 49.

The square root of 66694972 is about 8166.6989659225. The cubic root of 66694972 is about 405.5375111701.

The spelling of 66694972 in words is "sixty-six million, six hundred ninety-four thousand, nine hundred seventy-two".