667523577 has 16 divisors (see below), whose sum is σ = 1017681920. Its totient is φ = 381253392.

The previous prime is 667523573. The next prime is 667523587. The reversal of 667523577 is 775325766.

It is not a de Polignac number, because 667523577 - 2² = 667523573 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667523573) 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, 43374 + ... + 56712.

It is an arithmetic number, because the mean of its divisors is an integer number (63605120).

Almost surely, 2^667523577 is an apocalyptic number.

It is an amenable number.

667523577 is a deficient number, since it is larger than the sum of its proper divisors (350158343).

667523577 is a wasteful number, since it uses less digits than its factorization.

667523577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15732.

The product of its digits is 1852200, while the sum is 48.

The square root of 667523577 is about 25836.4776430534. The cubic root of 667523577 is about 873.9545945478.

The spelling of 667523577 in words is "six hundred sixty-seven million, five hundred twenty-three thousand, five hundred seventy-seven".