66489432 has 16 divisors (see below), whose sum is σ = 166223640. Its totient is φ = 22163136.

The previous prime is 66489421. The next prime is 66489503. The reversal of 66489432 is 23498466.

It is a happy number.

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, 1385173 + ... + 1385220.

Almost surely, 2^66489432 is an apocalyptic number.

It is an amenable number.

66489432 is an abundant number, since it is smaller than the sum of its proper divisors (99734208).

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

66489432 is a wasteful number, since it uses less digits than its factorization.

66489432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770402 (or 2770398 counting only the distinct ones).

The product of its digits is 248832, while the sum is 42.

The square root of 66489432 is about 8154.1052237508. The cubic root of 66489432 is about 405.1204884612.

The spelling of 66489432 in words is "sixty-six million, four hundred eighty-nine thousand, four hundred thirty-two".