7797664667957 has 2 divisors, whose sum is σ = 7797664667958. Its totient is φ = 7797664667956.

The previous prime is 7797664667951. The next prime is 7797664667981. The reversal of 7797664667957 is 7597664667977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4491118839076 + 3306545828881 = 2119226^2 + 1818391^2 .

It is a cyclic number.

It is not a de Polignac number, because 7797664667957 - 2⁸ = 7797664667701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7797664667951) 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, 3898832333978 + 3898832333979.

It is an arithmetic number, because the mean of its divisors is an integer number (3898832333979).

Almost surely, 2^{7797664667957} is an apocalyptic number.

It is an amenable number.

7797664667957 is a deficient number, since it is larger than the sum of its proper divisors (1).

7797664667957 is an equidigital number, since it uses as much as digits as its factorization.

7797664667957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35286632640, while the sum is 86.

The spelling of 7797664667957 in words is "seven trillion, seven hundred ninety-seven billion, six hundred sixty-four million, six hundred sixty-seven thousand, nine hundred fifty-seven".