8791374834661 has 2 divisors, whose sum is σ = 8791374834662. Its totient is φ = 8791374834660.

The previous prime is 8791374834617. The next prime is 8791374834689. The reversal of 8791374834661 is 1664384731978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6805346994436 + 1986027840225 = 2608706^2 + 1409265^2 .

It is a cyclic number.

It is not a de Polignac number, because 8791374834661 - 2²⁷ = 8791240616933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8791374834061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4395687417330 + 4395687417331.

It is an arithmetic number, because the mean of its divisors is an integer number (4395687417331).

Almost surely, 2^{8791374834661} is an apocalyptic number.

It is an amenable number.

8791374834661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8791374834661 is an equidigital number, since it uses as much as digits as its factorization.

8791374834661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 146313216, while the sum is 67.

The spelling of 8791374834661 in words is "eight trillion, seven hundred ninety-one billion, three hundred seventy-four million, eight hundred thirty-four thousand, six hundred sixty-one".