1166251566 has 16 divisors (see below), whose sum is σ = 2332889424. Its totient is φ = 388686144.

The previous prime is 1166251543. The next prime is 1166251571. The reversal of 1166251566 is 6651526611.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36250 + ... + 60386.

It is an arithmetic number, because the mean of its divisors is an integer number (145805589).

Almost surely, 2^1166251566 is an apocalyptic number.

1166251566 is an abundant number, since it is smaller than the sum of its proper divisors (1166637858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1166251566 is a wasteful number, since it uses less digits than its factorization.

1166251566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32195.

The product of its digits is 64800, while the sum is 39.

The square root of 1166251566 is about 34150.4255610380. The cubic root of 1166251566 is about 1052.6017312236.

The spelling of 1166251566 in words is "one billion, one hundred sixty-six million, two hundred fifty-one thousand, five hundred sixty-six".