66980016 has 60 divisors (see below), whose sum is σ = 197324920. Its totient is φ = 21150720.

The previous prime is 66980009. The next prime is 66980021. The reversal of 66980016 is 61008966.

66980016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9505 + ... + 14976.

Almost surely, 2^66980016 is an apocalyptic number.

It is an amenable number.

66980016 is an abundant number, since it is smaller than the sum of its proper divisors (130344904).

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

66980016 is a wasteful number, since it uses less digits than its factorization.

66980016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24514 (or 24505 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 66980016 is about 8184.1319637455. The cubic root of 66980016 is about 406.1144249459.

The spelling of 66980016 in words is "sixty-six million, nine hundred eighty thousand, sixteen".