666727357 has 2 divisors, whose sum is σ = 666727358. Its totient is φ = 666727356.

The previous prime is 666727349. The next prime is 666727367. The reversal of 666727357 is 753727666.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 548918041 + 117809316 = 23429^2 + 10854^2 .

It is a cyclic number.

It is not a de Polignac number, because 666727357 - 2³ = 666727349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 666727357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666727307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333363678 + 333363679.

It is an arithmetic number, because the mean of its divisors is an integer number (333363679).

Almost surely, 2^666727357 is an apocalyptic number.

It is an amenable number.

666727357 is a deficient number, since it is larger than the sum of its proper divisors (1).

666727357 is an equidigital number, since it uses as much as digits as its factorization.

666727357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2222640, while the sum is 49.

The square root of 666727357 is about 25821.0642112210. The cubic root of 666727357 is about 873.6069728767.

The spelling of 666727357 in words is "six hundred sixty-six million, seven hundred twenty-seven thousand, three hundred fifty-seven".