66665452 has 24 divisors (see below), whose sum is σ = 140349440. Its totient is φ = 27066960.

The previous prime is 66665447. The next prime is 66665479. The reversal of 66665452 is 25456666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62124 + ... + 63187.

Almost surely, 2^66665452 is an apocalyptic number.

It is an amenable number.

66665452 is an abundant number, since it is smaller than the sum of its proper divisors (73683988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66665452 is a wasteful number, since it uses less digits than its factorization.

66665452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125341 (or 125339 counting only the distinct ones).

The product of its digits is 259200, while the sum is 40.

The square root of 66665452 is about 8164.8914260999. The cubic root of 66665452 is about 405.4776704073.

The spelling of 66665452 in words is "sixty-six million, six hundred sixty-five thousand, four hundred fifty-two".