66633712 has 10 divisors (see below), whose sum is σ = 129102848. Its totient is φ = 33316848.

The previous prime is 66633701. The next prime is 66633719. The reversal of 66633712 is 21733666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66633719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2082288 + ... + 2082319.

Almost surely, 2^66633712 is an apocalyptic number.

It is an amenable number.

66633712 is a deficient number, since it is larger than the sum of its proper divisors (62469136).

66633712 is a wasteful number, since it uses less digits than its factorization.

66633712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4164615 (or 4164609 counting only the distinct ones).

The product of its digits is 27216, while the sum is 34.

The square root of 66633712 is about 8162.9475068752. The cubic root of 66633712 is about 405.4133097132.

The spelling of 66633712 in words is "sixty-six million, six hundred thirty-three thousand, seven hundred twelve".