667900580 has 48 divisors (see below), whose sum is σ = 1451122176. Its totient is φ = 257955840.

The previous prime is 667900567. The next prime is 667900613. The reversal of 667900580 is 85009766.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356807 + ... + 358673.

It is an arithmetic number, because the mean of its divisors is an integer number (30231712).

Almost surely, 2^667900580 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 667900580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (725561088).

667900580 is an abundant number, since it is smaller than the sum of its proper divisors (783221596).

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

667900580 is a wasteful number, since it uses less digits than its factorization.

667900580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484 (or 2482 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 667900580 is about 25843.7725574267. The cubic root of 667900580 is about 874.1190938536.

The spelling of 667900580 in words is "six hundred sixty-seven million, nine hundred thousand, five hundred eighty".