2645621166 has 8 divisors (see below), whose sum is σ = 5291242344. Its totient is φ = 881873720.

The previous prime is 2645621149. The next prime is 2645621171. The reversal of 2645621166 is 6611265462.

It is a sphenic number, since it is the product of 3 distinct primes.

2645621166 is an admirable number.

It is a super-2 number, since 2×2645621166² = 13998622707974399112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220468425 + ... + 220468436.

It is an arithmetic number, because the mean of its divisors is an integer number (661405293).

Almost surely, 2^2645621166 is an apocalyptic number.

2645621166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2645621166 is a wasteful number, since it uses less digits than its factorization.

2645621166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440936866.

The product of its digits is 103680, while the sum is 39.

The square root of 2645621166 is about 51435.6021253762. The cubic root of 2645621166 is about 1383.0648757739.

The spelling of 2645621166 in words is "two billion, six hundred forty-five million, six hundred twenty-one thousand, one hundred sixty-six".