1170576661 has 4 divisors (see below), whose sum is σ = 1175131692. Its totient is φ = 1166021632.

The previous prime is 1170576629. The next prime is 1170576713. The reversal of 1170576661 is 1666750711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1666750711 = 34819 ⋅47869.

It can be written as a sum of positive squares in 2 ways, for example, as 566154436 + 604422225 = 23794^2 + 24585^2 .

It is a cyclic number.

It is not a de Polignac number, because 1170576661 - 2⁵ = 1170576629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1170576601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2277130 + ... + 2277643.

It is an arithmetic number, because the mean of its divisors is an integer number (293782923).

Almost surely, 2^1170576661 is an apocalyptic number.

It is an amenable number.

1170576661 is a deficient number, since it is larger than the sum of its proper divisors (4555031).

1170576661 is an equidigital number, since it uses as much as digits as its factorization.

1170576661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4555030.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 1170576661 is about 34213.6911338137. The cubic root of 1170576661 is about 1053.9013325394.

The spelling of 1170576661 in words is "one billion, one hundred seventy million, five hundred seventy-six thousand, six hundred sixty-one".