2663991044 has 48 divisors (see below), whose sum is σ = 5552131200. Its totient is φ = 1102429440.

The previous prime is 2663991013. The next prime is 2663991053. The reversal of 2663991044 is 4401993662.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 2663990986 and 2663991004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9857 + ... + 73655.

It is an arithmetic number, because the mean of its divisors is an integer number (115669400).

Almost surely, 2^2663991044 is an apocalyptic number.

It is an amenable number.

2663991044 is an abundant number, since it is smaller than the sum of its proper divisors (2888140156).

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

2663991044 is a wasteful number, since it uses less digits than its factorization.

2663991044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63900 (or 63898 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 2663991044 is about 51613.8648426951. The cubic root of 2663991044 is about 1386.2586002123.

The spelling of 2663991044 in words is "two billion, six hundred sixty-three million, nine hundred ninety-one thousand, forty-four".