667764996 has 24 divisors (see below), whose sum is σ = 1558794720. Its totient is φ = 222491712.

The previous prime is 667764971. The next prime is 667765057. The reversal of 667764996 is 699467766.

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 7 ways as a sum of consecutive naturals, for example, 20160 + ... + 41736.

It is an arithmetic number, because the mean of its divisors is an integer number (64949780).

Almost surely, 2^667764996 is an apocalyptic number.

It is an amenable number.

667764996 is an abundant number, since it is smaller than the sum of its proper divisors (891029724).

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

667764996 is a wasteful number, since it uses less digits than its factorization.

667764996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24163 (or 24161 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 60.

The square root of 667764996 is about 25841.1492778475. The cubic root of 667764996 is about 874.0599410459.

The spelling of 667764996 in words is "six hundred sixty-seven million, seven hundred sixty-four thousand, nine hundred ninety-six".