11651660 has 24 divisors (see below), whose sum is σ = 25259136. Its totient is φ = 4510080.

The previous prime is 11651659. The next prime is 11651677. The reversal of 11651660 is 6615611.

It is a super-2 number, since 2×11651660² = 271522361511200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8777 + ... + 10016.

It is an arithmetic number, because the mean of its divisors is an integer number (1052464).

Almost surely, 2^11651660 is an apocalyptic number.

11651660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11651660 is an abundant number, since it is smaller than the sum of its proper divisors (13607476).

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

11651660 is a wasteful number, since it uses less digits than its factorization.

11651660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18833 (or 18831 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 11651660 is about 3413.4527973886. The cubic root of 11651660 is about 226.7057842907.

The spelling of 11651660 in words is "eleven million, six hundred fifty-one thousand, six hundred sixty".