1166857279 has 16 divisors (see below), whose sum is σ = 1404686080. Its totient is φ = 946883520.

The previous prime is 1166857273. The next prime is 1166857303. The reversal of 1166857279 is 9727586611.

It is a cyclic number.

It is not a de Polignac number, because 1166857279 - 2²¹ = 1164760127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166857273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 391264 + ... + 394234.

It is an arithmetic number, because the mean of its divisors is an integer number (87792880).

Almost surely, 2^1166857279 is an apocalyptic number.

1166857279 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1166857279 is a deficient number, since it is larger than the sum of its proper divisors (237828801).

1166857279 is a wasteful number, since it uses less digits than its factorization.

1166857279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5950.

The product of its digits is 1270080, while the sum is 52.

The square root of 1166857279 is about 34159.2927180877. The cubic root of 1166857279 is about 1052.7839286798.

The spelling of 1166857279 in words is "one billion, one hundred sixty-six million, eight hundred fifty-seven thousand, two hundred seventy-nine".