11666615005 has 8 divisors (see below), whose sum is σ = 14023236024. Its totient is φ = 9317760000.

The previous prime is 11666614987. The next prime is 11666615027. The reversal of 11666615005 is 50051666611.

It can be written as a sum of positive squares in 4 ways, for example, as 4662431524 + 7004183481 = 68282^2 + 83691^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11666615005 - 2¹¹ = 11666612957 is a prime.

It is a super-2 number, since 2×11666615005² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1938196 + ... + 1944205.

It is an arithmetic number, because the mean of its divisors is an integer number (1752904503).

Almost surely, 2^11666615005 is an apocalyptic number.

It is an amenable number.

11666615005 is a deficient number, since it is larger than the sum of its proper divisors (2356621019).

11666615005 is an equidigital number, since it uses as much as digits as its factorization.

11666615005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3883007.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 11666615005 in words is "eleven billion, six hundred sixty-six million, six hundred fifteen thousand, five".