667725775 has 24 divisors (see below), whose sum is σ = 844390400. Its totient is φ = 523692000.

The previous prime is 667725763. The next prime is 667725781. The reversal of 667725775 is 577527766.

It is not a de Polignac number, because 667725775 - 2⁵ = 667725743 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 297106 + ... + 299344.

Almost surely, 2^667725775 is an apocalyptic number.

667725775 is a deficient number, since it is larger than the sum of its proper divisors (176664625).

667725775 is a wasteful number, since it uses less digits than its factorization.

667725775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2479 (or 2474 counting only the distinct ones).

The product of its digits is 4321800, while the sum is 52.

The square root of 667725775 is about 25840.3903801781. The cubic root of 667725775 is about 874.0428281512.

The spelling of 667725775 in words is "six hundred sixty-seven million, seven hundred twenty-five thousand, seven hundred seventy-five".