11660616220 has 48 divisors (see below), whose sum is σ = 26720870400. Its totient is φ = 4239040320.

The previous prime is 11660616173. The next prime is 11660616229. The reversal of 11660616220 is 2261606611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11660616229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1333021 + ... + 1341739.

It is an arithmetic number, because the mean of its divisors is an integer number (556684800).

Almost surely, 2^11660616220 is an apocalyptic number.

11660616220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11660616220 is an abundant number, since it is smaller than the sum of its proper divisors (15060254180).

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

11660616220 is a wasteful number, since it uses less digits than its factorization.

11660616220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14818 (or 14816 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 11660616220 in words is "eleven billion, six hundred sixty million, six hundred sixteen thousand, two hundred twenty".