1166515560656 has 20 divisors (see below), whose sum is σ = 2379077788800. Its totient is φ = 552560002272.

The previous prime is 1166515560643. The next prime is 1166515560667. The reversal of 1166515560656 is 6560655156611.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1166515560598 and 1166515560607.

It is a congruent number.

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, 1918610816 + ... + 1918611423.

It is an arithmetic number, because the mean of its divisors is an integer number (118953889440).

Almost surely, 2^{1166515560656} is an apocalyptic number.

1166515560656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1166515560656 is an abundant number, since it is smaller than the sum of its proper divisors (1212562228144).

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

1166515560656 is a wasteful number, since it uses less digits than its factorization.

1166515560656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3837222266 (or 3837222260 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 53.

The spelling of 1166515560656 in words is "one trillion, one hundred sixty-six billion, five hundred fifteen million, five hundred sixty thousand, six hundred fifty-six".