1166877778 has 24 divisors (see below), whose sum is σ = 1939101696. Its totient is φ = 526208760.

The previous prime is 1166877749. The next prime is 1166877779. The reversal of 1166877778 is 8777786611.

It is not an unprimeable number, because it can be changed into a prime (1166877779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11751 + ... + 49717.

It is an arithmetic number, because the mean of its divisors is an integer number (80795904).

Almost surely, 2^1166877778 is an apocalyptic number.

1166877778 is a deficient number, since it is larger than the sum of its proper divisors (772223918).

1166877778 is a wasteful number, since it uses less digits than its factorization.

1166877778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38118 (or 38107 counting only the distinct ones).

The product of its digits is 5531904, while the sum is 58.

The square root of 1166877778 is about 34159.5927668935. The cubic root of 1166877778 is about 1052.7900936415.

The spelling of 1166877778 in words is "one billion, one hundred sixty-six million, eight hundred seventy-seven thousand, seven hundred seventy-eight".