2664404643 has 4 divisors (see below), whose sum is σ = 3552539528. Its totient is φ = 1776269760.

The previous prime is 2664404623. The next prime is 2664404707. The reversal of 2664404643 is 3464044662.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2664404643 - 2¹⁰ = 2664403619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2664404623) by changing a digit.

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, 444067438 + ... + 444067443.

It is an arithmetic number, because the mean of its divisors is an integer number (888134882).

Almost surely, 2^2664404643 is an apocalyptic number.

2664404643 is a deficient number, since it is larger than the sum of its proper divisors (888134885).

2664404643 is an equidigital number, since it uses as much as digits as its factorization.

2664404643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888134884.

The product of its (nonzero) digits is 331776, while the sum is 39.

The square root of 2664404643 is about 51617.8713528561. The cubic root of 2664404643 is about 1386.3303378786.

The spelling of 2664404643 in words is "two billion, six hundred sixty-four million, four hundred four thousand, six hundred forty-three".