2166151911 has 64 divisors (see below), whose sum is σ = 3661593600. Its totient is φ = 1106472960.

The previous prime is 2166151861. The next prime is 2166151931. The reversal of 2166151911 is 1191516612.

2166151911 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2166151911 - 2¹⁰ = 2166150887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166151931) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6206565 + ... + 6206913.

It is an arithmetic number, because the mean of its divisors is an integer number (57212400).

Almost surely, 2^2166151911 is an apocalyptic number.

2166151911 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2166151911 is a deficient number, since it is larger than the sum of its proper divisors (1495441689).

2166151911 is a wasteful number, since it uses less digits than its factorization.

2166151911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744.

The product of its digits is 3240, while the sum is 33.

The square root of 2166151911 is about 46541.9371212673. The cubic root of 2166151911 is about 1293.8868628624.

The spelling of 2166151911 in words is "two billion, one hundred sixty-six million, one hundred fifty-one thousand, nine hundred eleven".