1166503788677 has 2 divisors, whose sum is σ = 1166503788678. Its totient is φ = 1166503788676.

The previous prime is 1166503788649. The next prime is 1166503788683. The reversal of 1166503788677 is 7768873056611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 737041137121 + 429462651556 = 858511^2 + 655334^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166503788677 - 2⁶ = 1166503788613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1166593788677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583251894338 + 583251894339.

It is an arithmetic number, because the mean of its divisors is an integer number (583251894339).

Almost surely, 2^{1166503788677} is an apocalyptic number.

It is an amenable number.

1166503788677 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166503788677 is an equidigital number, since it uses as much as digits as its factorization.

1166503788677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71124480, while the sum is 65.

The spelling of 1166503788677 in words is "one trillion, one hundred sixty-six billion, five hundred three million, seven hundred eighty-eight thousand, six hundred seventy-seven".