1166859418777 has 8 divisors (see below), whose sum is σ = 1256629106376. Its totient is φ = 1077091341312.

The previous prime is 1166859418759. The next prime is 1166859418841. The reversal of 1166859418777 is 7778149586611.

It can be written as a sum of positive squares in 4 ways, for example, as 79227801 + 1166780190976 = 8901^2 + 1080176^2 .

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 1166859418777 - 2¹⁹ = 1166858894489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166839418777) 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, 1402383 + ... + 2073739.

It is an arithmetic number, because the mean of its divisors is an integer number (157078638297).

Almost surely, 2^{1166859418777} is an apocalyptic number.

It is an amenable number.

1166859418777 is a deficient number, since it is larger than the sum of its proper divisors (89769687599).

1166859418777 is a wasteful number, since it uses less digits than its factorization.

1166859418777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805067.

The product of its digits is 142248960, while the sum is 70.

The spelling of 1166859418777 in words is "one trillion, one hundred sixty-six billion, eight hundred fifty-nine million, four hundred eighteen thousand, seven hundred seventy-seven".