66381160 has 32 divisors (see below), whose sum is σ = 149594400. Its totient is φ = 26510400.

The previous prime is 66381149. The next prime is 66381181. The reversal of 66381160 is 6118366.

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, 41251 + ... + 42829.

It is an arithmetic number, because the mean of its divisors is an integer number (4674825).

Almost surely, 2^66381160 is an apocalyptic number.

It is an amenable number.

66381160 is an abundant number, since it is smaller than the sum of its proper divisors (83213240).

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

66381160 is a wasteful number, since it uses less digits than its factorization.

66381160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2641 (or 2637 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 66381160 is about 8147.4634089390. The cubic root of 66381160 is about 404.9004683524.

The spelling of 66381160 in words is "sixty-six million, three hundred eighty-one thousand, one hundred sixty".