66588980 has 12 divisors (see below), whose sum is σ = 139836900. Its totient is φ = 26635584.

The previous prime is 66588967. The next prime is 66589001. The reversal of 66588980 is 8988566.

It can be written as a sum of positive squares in 2 ways, for example, as 21939856 + 44649124 = 4684^2 + 6682^2 .

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, 1664705 + ... + 1664744.

It is an arithmetic number, because the mean of its divisors is an integer number (11653075).

Almost surely, 2^66588980 is an apocalyptic number.

It is an amenable number.

66588980 is an abundant number, since it is smaller than the sum of its proper divisors (73247920).

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

66588980 is a wasteful number, since it uses less digits than its factorization.

66588980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3329458 (or 3329456 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 50.

The square root of 66588980 is about 8160.2071052149. The cubic root of 66588980 is about 405.3225698199.

The spelling of 66588980 in words is "sixty-six million, five hundred eighty-eight thousand, nine hundred eighty".