1176666561 has 64 divisors (see below), whose sum is σ = 2169600000. Its totient is φ = 614972736.

The previous prime is 1176666521. The next prime is 1176666581. The reversal of 1176666561 is 1656666711.

It is not a de Polignac number, because 1176666561 - 2⁷ = 1176666433 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1176666521) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 98490 + ... + 109788.

It is an arithmetic number, because the mean of its divisors is an integer number (33900000).

Almost surely, 2^1176666561 is an apocalyptic number.

It is an amenable number.

1176666561 is a deficient number, since it is larger than the sum of its proper divisors (992933439).

1176666561 is a wasteful number, since it uses less digits than its factorization.

1176666561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11363 (or 11357 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 1176666561 is about 34302.5736789530. The cubic root of 1176666561 is about 1055.7258052954.

The spelling of 1176666561 in words is "one billion, one hundred seventy-six million, six hundred sixty-six thousand, five hundred sixty-one".