11666236613640 has 256 divisors, whose sum is σ = 42079108608000. Its totient is φ = 2530979834880.

The previous prime is 11666236613587. The next prime is 11666236613683. The reversal of 11666236613640 is 4631663266611.

It is a super-2 number, since 2×11666236613640² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2621316 + ... + 5495795.

It is an arithmetic number, because the mean of its divisors is an integer number (164371518000).

Almost surely, 2^{11666236613640} is an apocalyptic number.

11666236613640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11666236613640 is an abundant number, since it is smaller than the sum of its proper divisors (30412871994360).

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

11666236613640 is a wasteful number, since it uses less digits than its factorization.

11666236613640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8117220 (or 8117216 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 51.

The spelling of 11666236613640 in words is "eleven trillion, six hundred sixty-six billion, two hundred thirty-six million, six hundred thirteen thousand, six hundred forty".