2661614614605 has 64 divisors (see below), whose sum is σ = 4656346933248. Its totient is φ = 1292427386880.

The previous prime is 2661614614579. The next prime is 2661614614619. The reversal of 2661614614605 is 5064164161662.

It is not a de Polignac number, because 2661614614605 - 2⁵ = 2661614614573 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20749927 + ... + 20877803.

It is an arithmetic number, because the mean of its divisors is an integer number (72755420832).

Almost surely, 2^{2661614614605} is an apocalyptic number.

It is an amenable number.

2661614614605 is a deficient number, since it is larger than the sum of its proper divisors (1994732318643).

2661614614605 is a wasteful number, since it uses less digits than its factorization.

2661614614605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130566.

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 2661614614605 in words is "two trillion, six hundred sixty-one billion, six hundred fourteen million, six hundred fourteen thousand, six hundred five".