666572597 has 2 divisors, whose sum is σ = 666572598. Its totient is φ = 666572596.

The previous prime is 666572539. The next prime is 666572603. The reversal of 666572597 is 795275666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 390813361 + 275759236 = 19769^2 + 16606^2 .

It is a cyclic number.

It is not a de Polignac number, because 666572597 - 2⁸ = 666572341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666572507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333286298 + 333286299.

It is an arithmetic number, because the mean of its divisors is an integer number (333286299).

Almost surely, 2^666572597 is an apocalyptic number.

It is an amenable number.

666572597 is a deficient number, since it is larger than the sum of its proper divisors (1).

666572597 is an equidigital number, since it uses as much as digits as its factorization.

666572597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4762800, while the sum is 53.

The square root of 666572597 is about 25818.0672591889. The cubic root of 666572597 is about 873.5393740920.

The spelling of 666572597 in words is "six hundred sixty-six million, five hundred seventy-two thousand, five hundred ninety-seven".