11666456514 has 64 divisors (see below), whose sum is σ = 26193041280. Its totient is φ = 3848785920.

The previous prime is 11666456489. The next prime is 11666456521. The reversal of 11666456514 is 41565466611.

11666456514 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11666456514² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11666456514.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7425349 + ... + 7426919.

It is an arithmetic number, because the mean of its divisors is an integer number (409266270).

Almost surely, 2^11666456514 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11666456514, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13096520640).

11666456514 is an abundant number, since it is smaller than the sum of its proper divisors (14526584766).

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

11666456514 is a wasteful number, since it uses less digits than its factorization.

11666456514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2912 (or 2906 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The spelling of 11666456514 in words is "eleven billion, six hundred sixty-six million, four hundred fifty-six thousand, five hundred fourteen".