2660044644 has 48 divisors (see below), whose sum is σ = 6899314240. Its totient is φ = 886308480.

The previous prime is 2660044643. The next prime is 2660044649. The reversal of 2660044644 is 4464400662.

It is a happy number.

2660044644 is a `hidden beast` number, since 2 + 6 + 6 + 0 + 0 + 4 + 4 + 644 = 666.

2660044644 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2660044599 and 2660044608.

It is not an unprimeable number, because it can be changed into a prime (2660044643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 395292 + ... + 401964.

Almost surely, 2^2660044644 is an apocalyptic number.

It is an amenable number.

2660044644 is an abundant number, since it is smaller than the sum of its proper divisors (4239269596).

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

2660044644 is a wasteful number, since it uses less digits than its factorization.

2660044644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10377 (or 10369 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The square root of 2660044644 is about 51575.6206361106. The cubic root of 2660044644 is about 1385.5737337223.

The spelling of 2660044644 in words is "two billion, six hundred sixty million, forty-four thousand, six hundred forty-four".