11666660666650 has 48 divisors (see below), whose sum is σ = 23673402260640. Its totient is φ = 4242298913600.

The previous prime is 11666660666593. The next prime is 11666660666657. The reversal of 11666660666650 is 5666606666611.

It is a super-2 number, since 2×11666660666650² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11666660666657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19856397 + ... + 20435503.

It is an arithmetic number, because the mean of its divisors is an integer number (493195880430).

Almost surely, 2^{11666660666650} is an apocalyptic number.

11666660666650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11666660666650 is an abundant number, since it is smaller than the sum of its proper divisors (12006741593990).

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

11666660666650 is a wasteful number, since it uses less digits than its factorization.

11666660666650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615759 (or 615754 counting only the distinct ones).

The product of its (nonzero) digits is 50388480, while the sum is 61.

The spelling of 11666660666650 in words is "eleven trillion, six hundred sixty-six billion, six hundred sixty million, six hundred sixty-six thousand, six hundred fifty".