2603660664 has 128 divisors (see below), whose sum is σ = 7307182080. Its totient is φ = 766281600.

The previous prime is 2603660641. The next prime is 2603660671. The reversal of 2603660664 is 4660663062.

2603660664 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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2394729 + ... + 2395815.

It is an arithmetic number, because the mean of its divisors is an integer number (57087360).

Almost surely, 2^2603660664 is an apocalyptic number.

2603660664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2603660664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3653591040).

2603660664 is an abundant number, since it is smaller than the sum of its proper divisors (4703521416).

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

2603660664 is a wasteful number, since it uses less digits than its factorization.

2603660664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361 (or 1357 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 39.

The square root of 2603660664 is about 51026.0782737612. The cubic root of 2603660664 is about 1375.7139061211.

The spelling of 2603660664 in words is "two billion, six hundred three million, six hundred sixty thousand, six hundred sixty-four".