2660204261605 has 16 divisors (see below), whose sum is σ = 3486484560384. Its totient is φ = 1932452150080.

The previous prime is 2660204261599. The next prime is 2660204261657. The reversal of 2660204261605 is 5061624020662.

It is not a de Polignac number, because 2660204261605 - 2²¹ = 2660202164453 is a prime.

It is a super-2 number, since 2×2660204261605² (a number of 26 digits) contains 22 as substring.

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, 27975334 + ... + 28070263.

It is an arithmetic number, because the mean of its divisors is an integer number (217905285024).

Almost surely, 2^{2660204261605} is an apocalyptic number.

It is an amenable number.

2660204261605 is a deficient number, since it is larger than the sum of its proper divisors (826280298779).

2660204261605 is a wasteful number, since it uses less digits than its factorization.

2660204261605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56046476.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 2660204261605 in words is "two trillion, six hundred sixty billion, two hundred four million, two hundred sixty-one thousand, six hundred five".