665264332104947 has 2 divisors, whose sum is σ = 665264332104948. Its totient is φ = 665264332104946.

The previous prime is 665264332104937. The next prime is 665264332105019. The reversal of 665264332104947 is 749401233462566.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665264332104947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665264332104947.

It is not a weakly prime, because it can be changed into another prime (665264332104917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332632166052473 + 332632166052474.

It is an arithmetic number, because the mean of its divisors is an integer number (332632166052474).

Almost surely, 2^{665264332104947} is an apocalyptic number.

665264332104947 is a deficient number, since it is larger than the sum of its proper divisors (1).

665264332104947 is an equidigital number, since it uses as much as digits as its factorization.

665264332104947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 156764160, while the sum is 62.

The spelling of 665264332104947 in words is "six hundred sixty-five trillion, two hundred sixty-four billion, three hundred thirty-two million, one hundred four thousand, nine hundred forty-seven".