11665660 has 24 divisors (see below), whose sum is σ = 24570000. Its totient is φ = 4652544.

The previous prime is 11665651. The next prime is 11665663. The reversal of 11665660 is 6656611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11665663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8716 + ... + 9964.

It is an arithmetic number, because the mean of its divisors is an integer number (1023750).

Almost surely, 2^11665660 is an apocalyptic number.

11665660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11665660 is an abundant number, since it is smaller than the sum of its proper divisors (12904340).

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

11665660 is a wasteful number, since it uses less digits than its factorization.

11665660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725 (or 1723 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 11665660 is about 3415.5028912299. The cubic root of 11665660 is about 226.7965470558.

It can be divided in two parts, 1 and 1665660, that added together give a palindrome (1665661).

The spelling of 11665660 in words is "eleven million, six hundred sixty-five thousand, six hundred sixty".