66985492 has 24 divisors (see below), whose sum is σ = 134160320. Its totient is φ = 28667520.

The previous prime is 66985489. The next prime is 66985493. The reversal of 66985492 is 29458966.

It is a super-2 number, since 2×66985492² = 8974112276964128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66985493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27067 + ... + 29437.

Almost surely, 2^66985492 is an apocalyptic number.

It is an amenable number.

66985492 is an abundant number, since it is smaller than the sum of its proper divisors (67174828).

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

66985492 is a wasteful number, since it uses less digits than its factorization.

66985492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3391 (or 3389 counting only the distinct ones).

The product of its digits is 933120, while the sum is 49.

The square root of 66985492 is about 8184.4665067431. The cubic root of 66985492 is about 406.1254920379.

The spelling of 66985492 in words is "sixty-six million, nine hundred eighty-five thousand, four hundred ninety-two".