660322997 has 2 divisors, whose sum is σ = 660322998. Its totient is φ = 660322996.

The previous prime is 660322967. The next prime is 660323021. The reversal of 660322997 is 799223066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 464574916 + 195748081 = 21554^2 + 13991^2 .

It is a cyclic number.

It is not a de Polignac number, because 660322997 - 2¹⁶ = 660257461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660322937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330161498 + 330161499.

It is an arithmetic number, because the mean of its divisors is an integer number (330161499).

Almost surely, 2^660322997 is an apocalyptic number.

It is an amenable number.

660322997 is a deficient number, since it is larger than the sum of its proper divisors (1).

660322997 is an equidigital number, since it uses as much as digits as its factorization.

660322997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 660322997 is about 25696.7507089904. The cubic root of 660322997 is about 870.8007763434.

The spelling of 660322997 in words is "six hundred sixty million, three hundred twenty-two thousand, nine hundred ninety-seven".