667972075 has 24 divisors (see below), whose sum is σ = 923177520. Its totient is φ = 476467200.

The previous prime is 667972073. The next prime is 667972087. The reversal of 667972075 is 570279766.

It is a happy number.

It is not a de Polignac number, because 667972075 - 2¹ = 667972073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667972073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33286 + ... + 49435.

It is an arithmetic number, because the mean of its divisors is an integer number (38465730).

Almost surely, 2^667972075 is an apocalyptic number.

667972075 is a deficient number, since it is larger than the sum of its proper divisors (255205445).

667972075 is a wasteful number, since it uses less digits than its factorization.

667972075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82767 (or 82762 counting only the distinct ones).

The product of its (nonzero) digits is 1111320, while the sum is 49.

The square root of 667972075 is about 25845.1557356500. The cubic root of 667972075 is about 874.1502825847.

The spelling of 667972075 in words is "six hundred sixty-seven million, nine hundred seventy-two thousand, seventy-five".