11666665050091 has 2 divisors, whose sum is σ = 11666665050092. Its totient is φ = 11666665050090.

The previous prime is 11666665050071. The next prime is 11666665050097. The reversal of 11666665050091 is 19005056666611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11666665050091 - 2²¹ = 11666662952939 is a prime.

It is a super-2 number, since 2×11666665050091² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11666665050097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5833332525045 + 5833332525046.

It is an arithmetic number, because the mean of its divisors is an integer number (5833332525046).

Almost surely, 2^{11666665050091} is an apocalyptic number.

11666665050091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11666665050091 is an equidigital number, since it uses as much as digits as its factorization.

11666665050091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1749600, while the sum is 52.

The spelling of 11666665050091 in words is "eleven trillion, six hundred sixty-six billion, six hundred sixty-five million, fifty thousand, ninety-one".