66480680 has 64 divisors (see below), whose sum is σ = 175150080. Its totient is φ = 22233600.

The previous prime is 66480679. The next prime is 66480703. The reversal of 66480680 is 8608466.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8585 + ... + 14375.

It is an arithmetic number, because the mean of its divisors is an integer number (2736720).

Almost surely, 2^66480680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66480680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87575040).

66480680 is an abundant number, since it is smaller than the sum of its proper divisors (108669400).

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

66480680 is a wasteful number, since it uses less digits than its factorization.

66480680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5850 (or 5846 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 66480680 is about 8153.5685438954. The cubic root of 66480680 is about 405.1027123525.

The spelling of 66480680 in words is "sixty-six million, four hundred eighty thousand, six hundred eighty".