10661615605 has 16 divisors (see below), whose sum is σ = 13154416128. Its totient is φ = 8290512000.

The previous prime is 10661615579. The next prime is 10661615623. The reversal of 10661615605 is 50651616601.

It is a de Polignac number, because none of the positive numbers 2^k-10661615605 is a prime.

It is a super-2 number, since 2×10661615605² (a number of 21 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, 40401 + ... + 151510.

It is an arithmetic number, because the mean of its divisors is an integer number (822151008).

Almost surely, 2^10661615605 is an apocalyptic number.

It is an amenable number.

10661615605 is a deficient number, since it is larger than the sum of its proper divisors (2492800523).

10661615605 is a wasteful number, since it uses less digits than its factorization.

10661615605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192228.

The product of its (nonzero) digits is 32400, while the sum is 37.

It can be divided in two parts, 106616 and 15605, that added together give a palindrome (122221).

The spelling of 10661615605 in words is "ten billion, six hundred sixty-one million, six hundred fifteen thousand, six hundred five".