11666666665 has 8 divisors (see below), whose sum is σ = 14001438528. Its totient is φ = 9332374320.

The previous prime is 11666666633. The next prime is 11666666681. The reversal of 11666666665 is 56666666611.

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

It is not a de Polignac number, because 11666666665 - 2⁵ = 11666666633 is a prime.

It is a super-2 number, since 2×11666666665² (a number of 21 digits) contains 22 as substring.

It is a Duffinian 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, 63981 + ... + 165610.

It is an arithmetic number, because the mean of its divisors is an integer number (1750179816).

Almost surely, 2^11666666665 is an apocalyptic number.

It is an amenable number.

11666666665 is a deficient number, since it is larger than the sum of its proper divisors (2334771863).

11666666665 is a wasteful number, since it uses less digits than its factorization.

11666666665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239759.

The product of its digits is 8398080, while the sum is 55.

The spelling of 11666666665 in words is "eleven billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-five".