91668212411 has 2 divisors, whose sum is σ = 91668212412. Its totient is φ = 91668212410.

The previous prime is 91668212381. The next prime is 91668212423. The reversal of 91668212411 is 11421286619.

It is a strong prime.

It is an emirp because it is prime and its reverse (11421286619) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91668212411 is a prime.

It is a super-2 number, since 2×91668212411² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91668212491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45834106205 + 45834106206.

It is an arithmetic number, because the mean of its divisors is an integer number (45834106206).

Almost surely, 2^91668212411 is an apocalyptic number.

91668212411 is a deficient number, since it is larger than the sum of its proper divisors (1).

91668212411 is an equidigital number, since it uses as much as digits as its factorization.

91668212411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 41.

The spelling of 91668212411 in words is "ninety-one billion, six hundred sixty-eight million, two hundred twelve thousand, four hundred eleven".