2660015616 has 80 divisors (see below), whose sum is σ = 7098392400. Its totient is φ = 885178368.

The previous prime is 2660015587. The next prime is 2660015621. The reversal of 2660015616 is 6165100662.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1272300 + ... + 1274388.

It is an arithmetic number, because the mean of its divisors is an integer number (88729905).

Almost surely, 2^2660015616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2660015616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3549196200).

2660015616 is an abundant number, since it is smaller than the sum of its proper divisors (4438376784).

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

2660015616 is an equidigital number, since it uses as much as digits as its factorization.

2660015616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939 (or 2923 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 2660015616 is about 51575.3392233149. The cubic root of 2660015616 is about 1385.5686936338.

The spelling of 2660015616 in words is "two billion, six hundred sixty million, fifteen thousand, six hundred sixteen".