667975268 has 12 divisors (see below), whose sum is σ = 1169872620. Its totient is φ = 333725952.

The previous prime is 667975261. The next prime is 667975277. The reversal of 667975268 is 862579766.

It can be written as a sum of positive squares in 2 ways, for example, as 194825764 + 473149504 = 13958^2 + 21752^2 .

It is not an unprimeable number, because it can be changed into a prime (667975261) 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, 59621 + ... + 69932.

It is an arithmetic number, because the mean of its divisors is an integer number (97489385).

Almost surely, 2^667975268 is an apocalyptic number.

It is an amenable number.

667975268 is a deficient number, since it is larger than the sum of its proper divisors (501897352).

667975268 is a wasteful number, since it uses less digits than its factorization.

667975268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130846 (or 130844 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 56.

The square root of 667975268 is about 25845.2175073068. The cubic root of 667975268 is about 874.1516754361.

The spelling of 667975268 in words is "six hundred sixty-seven million, nine hundred seventy-five thousand, two hundred sixty-eight".