2658656660 has 48 divisors (see below), whose sum is σ = 6095017152. Its totient is φ = 966105600.

The previous prime is 2658656591. The next prime is 2658656669. The reversal of 2658656660 is 666568562.

It is a junction number, because it is equal to n+sod(n) for n = 2658656599 and 2658656608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2658656669) 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, 395084 + ... + 401756.

It is an arithmetic number, because the mean of its divisors is an integer number (126979524).

Almost surely, 2^2658656660 is an apocalyptic number.

2658656660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2658656660 is an abundant number, since it is smaller than the sum of its proper divisors (3436360492).

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

2658656660 is a wasteful number, since it uses less digits than its factorization.

2658656660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8504 (or 8502 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 50.

The square root of 2658656660 is about 51562.1630655658. The cubic root of 2658656660 is about 1385.3326990754.

The spelling of 2658656660 in words is "two billion, six hundred fifty-eight million, six hundred fifty-six thousand, six hundred sixty".