667436880 has 80 divisors (see below), whose sum is σ = 2257159104. Its totient is φ = 161802240.

The previous prime is 667436837. The next prime is 667436893. The reversal of 667436880 is 88634766.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123769 + ... + 129048.

Almost surely, 2^667436880 is an apocalyptic number.

667436880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667436880 is an abundant number, since it is smaller than the sum of its proper divisors (1589722224).

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

667436880 is a wasteful number, since it uses less digits than its factorization.

667436880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252844 (or 252838 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The square root of 667436880 is about 25834.7997863347. The cubic root of 667436880 is about 873.9167569220.

The spelling of 667436880 in words is "six hundred sixty-seven million, four hundred thirty-six thousand, eight hundred eighty".