2661316655 has 16 divisors (see below), whose sum is σ = 3272046624. Its totient is φ = 2076869760.

The previous prime is 2661316639. The next prime is 2661316661. The reversal of 2661316655 is 5566131662.

2661316655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2661316655 - 2⁴ = 2661316639 is a prime.

It is a Duffinian number.

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, 168977 + ... + 184053.

It is an arithmetic number, because the mean of its divisors is an integer number (204502914).

Almost surely, 2^2661316655 is an apocalyptic number.

2661316655 is a deficient number, since it is larger than the sum of its proper divisors (610729969).

2661316655 is a wasteful number, since it uses less digits than its factorization.

2661316655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15946.

The product of its digits is 194400, while the sum is 41.

The square root of 2661316655 is about 51587.9506764903. The cubic root of 2661316655 is about 1385.7945551005.

The spelling of 2661316655 in words is "two billion, six hundred sixty-one million, three hundred sixteen thousand, six hundred fifty-five".