667994592 has 24 divisors (see below), whose sum is σ = 1753486056. Its totient is φ = 222664832.

The previous prime is 667994581. The next prime is 667994611. The reversal of 667994592 is 295499766.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

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, 3479043 + ... + 3479234.

It is an arithmetic number, because the mean of its divisors is an integer number (73061919).

Almost surely, 2^667994592 is an apocalyptic number.

It is an amenable number.

667994592 is an abundant number, since it is smaller than the sum of its proper divisors (1085491464).

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

667994592 is a wasteful number, since it uses less digits than its factorization.

667994592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6958290 (or 6958282 counting only the distinct ones).

The product of its digits is 7348320, while the sum is 57.

The square root of 667994592 is about 25845.5913455274. The cubic root of 667994592 is about 874.1601048620.

It can be divided in two parts, 66799459 and 2, that added together give a triangular number (66799461 = T₁₁₅₅₈).

The spelling of 667994592 in words is "six hundred sixty-seven million, nine hundred ninety-four thousand, five hundred ninety-two".