2166632889 has 4 divisors (see below), whose sum is σ = 2888843856. Its totient is φ = 1444421924.

The previous prime is 2166632863. The next prime is 2166632969. The reversal of 2166632889 is 9882366612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2166632889 - 2¹³ = 2166624697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2166632389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361105479 + ... + 361105484.

It is an arithmetic number, because the mean of its divisors is an integer number (722210964).

Almost surely, 2^2166632889 is an apocalyptic number.

It is an amenable number.

2166632889 is a deficient number, since it is larger than the sum of its proper divisors (722210967).

2166632889 is an equidigital number, since it uses as much as digits as its factorization.

2166632889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722210966.

The product of its digits is 1492992, while the sum is 51.

The square root of 2166632889 is about 46547.1039808064. The cubic root of 2166632889 is about 1293.9826217759.

The spelling of 2166632889 in words is "two billion, one hundred sixty-six million, six hundred thirty-two thousand, eight hundred eighty-nine".