667406680 has 16 divisors (see below), whose sum is σ = 1501665120. Its totient is φ = 266962656.

The previous prime is 667406659. The next prime is 667406681. The reversal of 667406680 is 86604766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667406681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8342544 + ... + 8342623.

It is an arithmetic number, because the mean of its divisors is an integer number (93854070).

Almost surely, 2^667406680 is an apocalyptic number.

It is an amenable number.

667406680 is an abundant number, since it is smaller than the sum of its proper divisors (834258440).

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

667406680 is a wasteful number, since it uses less digits than its factorization.

667406680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16685178 (or 16685174 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 667406680 is about 25834.2152967726. The cubic root of 667406680 is about 873.9035758083.

The spelling of 667406680 in words is "six hundred sixty-seven million, four hundred six thousand, six hundred eighty".