91666633 has 2 divisors, whose sum is σ = 91666634. Its totient is φ = 91666632.

The previous prime is 91666607. The next prime is 91666667. The reversal of 91666633 is 33666619.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90878089 + 788544 = 9533^2 + 888^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91666633 is a prime.

It is not a weakly prime, because it can be changed into another prime (91666033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45833316 + 45833317.

It is an arithmetic number, because the mean of its divisors is an integer number (45833317).

Almost surely, 2^91666633 is an apocalyptic number.

It is an amenable number.

91666633 is a deficient number, since it is larger than the sum of its proper divisors (1).

91666633 is an equidigital number, since it uses as much as digits as its factorization.

91666633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 40.

The square root of 91666633 is about 9574.2693193789. The cubic root of 91666633 is about 450.8898162993.

The spelling of 91666633 in words is "ninety-one million, six hundred sixty-six thousand, six hundred thirty-three".