660469613 has 2 divisors, whose sum is σ = 660469614. Its totient is φ = 660469612.

The previous prime is 660469609. The next prime is 660469627. The reversal of 660469613 is 316964066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 611721289 + 48748324 = 24733^2 + 6982^2 .

It is a cyclic number.

It is not a de Polignac number, because 660469613 - 2² = 660469609 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660469673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330234806 + 330234807.

It is an arithmetic number, because the mean of its divisors is an integer number (330234807).

Almost surely, 2^660469613 is an apocalyptic number.

It is an amenable number.

660469613 is a deficient number, since it is larger than the sum of its proper divisors (1).

660469613 is an equidigital number, since it uses as much as digits as its factorization.

660469613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 660469613 is about 25699.6033626980. The cubic root of 660469613 is about 870.8652215109.

The spelling of 660469613 in words is "six hundred sixty million, four hundred sixty-nine thousand, six hundred thirteen".