2168665877 has 16 divisors (see below), whose sum is σ = 2626058880. Its totient is φ = 1748318208.

The previous prime is 2168665861. The next prime is 2168665897. The reversal of 2168665877 is 7785668612.

It is not a de Polignac number, because 2168665877 - 2⁴ = 2168665861 is a prime.

It is a super-2 number, since 2×2168665877² = 9406223372128358258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2168665817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196574 + ... + 207312.

It is an arithmetic number, because the mean of its divisors is an integer number (164128680).

Almost surely, 2^2168665877 is an apocalyptic number.

It is an amenable number.

2168665877 is a deficient number, since it is larger than the sum of its proper divisors (457393003).

2168665877 is a wasteful number, since it uses less digits than its factorization.

2168665877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12460.

The product of its digits is 6773760, while the sum is 56.

The square root of 2168665877 is about 46568.9368248836. The cubic root of 2168665877 is about 1294.3872171259.

The spelling of 2168665877 in words is "two billion, one hundred sixty-eight million, six hundred sixty-five thousand, eight hundred seventy-seven".