111666000491 has 2 divisors, whose sum is σ = 111666000492. Its totient is φ = 111666000490.

The previous prime is 111666000473. The next prime is 111666000521. The reversal of 111666000491 is 194000666111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111666000491 - 2²² = 111661806187 is a prime.

It is not a weakly prime, because it can be changed into another prime (111666000451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55833000245 + 55833000246.

It is an arithmetic number, because the mean of its divisors is an integer number (55833000246).

Almost surely, 2^111666000491 is an apocalyptic number.

111666000491 is a deficient number, since it is larger than the sum of its proper divisors (1).

111666000491 is an equidigital number, since it uses as much as digits as its factorization.

111666000491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 111666000491 in words is "one hundred eleven billion, six hundred sixty-six million, four hundred ninety-one", and thus it is an aban number.