1166166257 has 8 divisors (see below), whose sum is σ = 1179076800. Its totient is φ = 1153296144.

The previous prime is 1166166191. The next prime is 1166166311. The reversal of 1166166257 is 7526616611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1166166257 - 2³⁰ = 92424433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166126257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49844 + ... + 69402.

It is an arithmetic number, because the mean of its divisors is an integer number (147384600).

Almost surely, 2^1166166257 is an apocalyptic number.

It is an amenable number.

1166166257 is a deficient number, since it is larger than the sum of its proper divisors (12910543).

1166166257 is a wasteful number, since it uses less digits than its factorization.

1166166257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20215.

The product of its digits is 90720, while the sum is 41.

The square root of 1166166257 is about 34149.1765200861. The cubic root of 1166166257 is about 1052.5760653515.

The spelling of 1166166257 in words is "one billion, one hundred sixty-six million, one hundred sixty-six thousand, two hundred fifty-seven".