1166859418778 has 32 divisors (see below), whose sum is σ = 1817829423360. Its totient is φ = 561080278080.

The previous prime is 1166859418759. The next prime is 1166859418841. The reversal of 1166859418778 is 8778149586611.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15285701 + ... + 15361847.

It is an arithmetic number, because the mean of its divisors is an integer number (56807169480).

Almost surely, 2^{1166859418778} is an apocalyptic number.

1166859418778 is a deficient number, since it is larger than the sum of its proper divisors (650970004582).

1166859418778 is a wasteful number, since it uses less digits than its factorization.

1166859418778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77222.

The product of its digits is 162570240, while the sum is 71.

The spelling of 1166859418778 in words is "one trillion, one hundred sixty-six billion, eight hundred fifty-nine million, four hundred eighteen thousand, seven hundred seventy-eight".