1166623751 has 2 divisors, whose sum is σ = 1166623752. Its totient is φ = 1166623750.

The previous prime is 1166623739. The next prime is 1166623811. The reversal of 1166623751 is 1573266611.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1166623751 is a prime.

It is a super-2 number, since 2×1166623751² = 2722021952794620002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1166623951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583311875 + 583311876.

It is an arithmetic number, because the mean of its divisors is an integer number (583311876).

Almost surely, 2^1166623751 is an apocalyptic number.

1166623751 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166623751 is an equidigital number, since it uses as much as digits as its factorization.

1166623751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 1166623751 is about 34155.8743263878. The cubic root of 1166623751 is about 1052.7136913186.

The spelling of 1166623751 in words is "one billion, one hundred sixty-six million, six hundred twenty-three thousand, seven hundred fifty-one".