667037680 has 20 divisors (see below), whose sum is σ = 1550862792. Its totient is φ = 266815040.

The previous prime is 667037641. The next prime is 667037711. The reversal of 667037680 is 86730766.

667037680 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

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, 4168906 + ... + 4169065.

Almost surely, 2^667037680 is an apocalyptic number.

It is an amenable number.

667037680 is an abundant number, since it is smaller than the sum of its proper divisors (883825112).

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

667037680 is a wasteful number, since it uses less digits than its factorization.

667037680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8337984 (or 8337978 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 667037680 is about 25827.0726177010. The cubic root of 667037680 is about 873.7424896834.

The spelling of 667037680 in words is "six hundred sixty-seven million, thirty-seven thousand, six hundred eighty".