667579880 has 32 divisors (see below), whose sum is σ = 1638606240. Its totient is φ = 242756160.

The previous prime is 667579879. The next prime is 667579883. The reversal of 667579880 is 88975766.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (667579883) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 758174 + ... + 759053.

It is an arithmetic number, because the mean of its divisors is an integer number (51206445).

Almost surely, 2^667579880 is an apocalyptic number.

It is an amenable number.

667579880 is an abundant number, since it is smaller than the sum of its proper divisors (971026360).

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

667579880 is a wasteful number, since it uses less digits than its factorization.

667579880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517249 (or 1517245 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 56.

The square root of 667579880 is about 25837.5672229411. The cubic root of 667579880 is about 873.9791654064.

The spelling of 667579880 in words is "six hundred sixty-seven million, five hundred seventy-nine thousand, eight hundred eighty".