666867675 has 24 divisors (see below), whose sum is σ = 1104197680. Its totient is φ = 355132800.

The previous prime is 666867671. The next prime is 666867679. The reversal of 666867675 is 576768666.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (666867671) and next prime (666867679).

It is not a de Polignac number, because 666867675 - 2² = 666867671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666867671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46905 + ... + 59445.

Almost surely, 2^666867675 is an apocalyptic number.

666867675 is a deficient number, since it is larger than the sum of its proper divisors (437330005).

666867675 is a wasteful number, since it uses less digits than its factorization.

666867675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13263 (or 13258 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 57.

The square root of 666867675 is about 25823.7811909875. The cubic root of 666867675 is about 873.6682543903.

Subtracting from 666867675 its reverse (576768666), we obtain a palindrome (90099009).

The spelling of 666867675 in words is "six hundred sixty-six million, eight hundred sixty-seven thousand, six hundred seventy-five".