2620600660 has 48 divisors (see below), whose sum is σ = 6027935760. Its totient is φ = 952555520.

The previous prime is 2620600613. The next prime is 2620600673. The reversal of 2620600660 is 660060262.

It can be written as a sum of positive squares in 8 ways, for example, as 212343184 + 2408257476 = 14572^2 + 49074^2 .

It is a congruent number.

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, 123031 + ... + 142750.

It is an arithmetic number, because the mean of its divisors is an integer number (125581995).

Almost surely, 2^2620600660 is an apocalyptic number.

2620600660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2620600660 is an abundant number, since it is smaller than the sum of its proper divisors (3407335100).

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

2620600660 is a wasteful number, since it uses less digits than its factorization.

2620600660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265836 (or 265834 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 2620600660 is about 51191.8026640985. The cubic root of 2620600660 is about 1378.6910258194.

The spelling of 2620600660 in words is "two billion, six hundred twenty million, six hundred thousand, six hundred sixty".