11666140 has 36 divisors (see below), whose sum is σ = 25183368. Its totient is φ = 4539520.

The previous prime is 11666117. The next prime is 11666141. The reversal of 11666140 is 4166611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11666141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33447 + ... + 33793.

It is an arithmetic number, because the mean of its divisors is an integer number (699538).

Almost surely, 2^11666140 is an apocalyptic number.

11666140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11666140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12591684).

11666140 is an abundant number, since it is smaller than the sum of its proper divisors (13517228).

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

11666140 is a wasteful number, since it uses less digits than its factorization.

11666140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 11666140 is about 3415.5731583440. The cubic root of 11666140 is about 226.7996576342.

The spelling of 11666140 in words is "eleven million, six hundred sixty-six thousand, one hundred forty".