1166561072 has 20 divisors (see below), whose sum is σ = 2297266656. Its totient is φ = 573718080.

The previous prime is 1166561023. The next prime is 1166561089. The reversal of 1166561072 is 2701656611.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596648 + ... + 598599.

Almost surely, 2^1166561072 is an apocalyptic number.

It is an amenable number.

1166561072 is a deficient number, since it is larger than the sum of its proper divisors (1130705584).

1166561072 is a wasteful number, since it uses less digits than its factorization.

1166561072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195316 (or 1195310 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 1166561072 is about 34154.9567705772. The cubic root of 1166561072 is about 1052.6948379899.

The spelling of 1166561072 in words is "one billion, one hundred sixty-six million, five hundred sixty-one thousand, seventy-two".