66986080 has 48 divisors (see below), whose sum is σ = 180865440. Its totient is φ = 22966272.

The previous prime is 66986057. The next prime is 66986081. The reversal of 66986080 is 8068966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66986081) 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, 28785 + ... + 31024.

It is an arithmetic number, because the mean of its divisors is an integer number (3768030).

Almost surely, 2^66986080 is an apocalyptic number.

It is an amenable number.

66986080 is an abundant number, since it is smaller than the sum of its proper divisors (113879360).

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

66986080 is a wasteful number, since it uses less digits than its factorization.

66986080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59831 (or 59823 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 66986080 is about 8184.5024283703. The cubic root of 66986080 is about 406.1266803603.

The spelling of 66986080 in words is "sixty-six million, nine hundred eighty-six thousand, eighty".