666600597 has 40 divisors (see below), whose sum is σ = 1076306616. Its totient is φ = 408716928.

The previous prime is 666600593. The next prime is 666600601. The reversal of 666600597 is 795006666.

It is an interprime number because it is at equal distance from previous prime (666600593) and next prime (666600601).

It can be written as a sum of positive squares in 4 ways, for example, as 96059601 + 570540996 = 9801^2 + 23886^2 .

It is not a de Polignac number, because 666600597 - 2² = 666600593 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666600593) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 332803 + ... + 334799.

Almost surely, 2^666600597 is an apocalyptic number.

It is an amenable number.

666600597 is a deficient number, since it is larger than the sum of its proper divisors (409706019).

666600597 is a wasteful number, since it uses less digits than its factorization.

666600597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339 (or 2330 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 666600597 is about 25818.6095094217. The cubic root of 666600597 is about 873.5516051979.

The spelling of 666600597 in words is "six hundred sixty-six million, six hundred thousand, five hundred ninety-seven".