667265823 has 16 divisors (see below), whose sum is σ = 1129762560. Its totient is φ = 381294648.

The previous prime is 667265789. The next prime is 667265831. The reversal of 667265823 is 328562766.

It is a happy number.

667265823 is a `hidden beast` number, since 6 + 67 + 2 + 6 + 582 + 3 = 666.

It is not a de Polignac number, because 667265823 - 2⁹ = 667265311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667265323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1765065 + ... + 1765442.

It is an arithmetic number, because the mean of its divisors is an integer number (70610160).

Almost surely, 2^667265823 is an apocalyptic number.

667265823 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

667265823 is a deficient number, since it is larger than the sum of its proper divisors (462496737).

667265823 is a wasteful number, since it uses less digits than its factorization.

667265823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3530523 (or 3530517 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 667265823 is about 25831.4889814738. The cubic root of 667265823 is about 873.8420920082.

The spelling of 667265823 in words is "six hundred sixty-seven million, two hundred sixty-five thousand, eight hundred twenty-three".