2166612136 has 32 divisors (see below), whose sum is σ = 4388176800. Its totient is φ = 996937920.

The previous prime is 2166612131. The next prime is 2166612139. The reversal of 2166612136 is 6312166612.

It is not an unprimeable number, because it can be changed into a prime (2166612131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2955 + ... + 65893.

It is an arithmetic number, because the mean of its divisors is an integer number (137130525).

Almost surely, 2^2166612136 is an apocalyptic number.

2166612136 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2166612136 is an abundant number, since it is smaller than the sum of its proper divisors (2221564664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2166612136 is a wasteful number, since it uses less digits than its factorization.

2166612136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63289 (or 63285 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 2166612136 is about 46546.8810555552. The cubic root of 2166612136 is about 1293.9784903104.

Adding to 2166612136 its reverse (6312166612), we get a palindrome (8478778748).

The spelling of 2166612136 in words is "two billion, one hundred sixty-six million, six hundred twelve thousand, one hundred thirty-six".