91066402573 has 2 divisors, whose sum is σ = 91066402574. Its totient is φ = 91066402572.

The previous prime is 91066402543. The next prime is 91066402577. The reversal of 91066402573 is 37520466019.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90970401769 + 96000804 = 301613^2 + 9798^2 .

It is a cyclic number.

It is not a de Polignac number, because 91066402573 - 2³³ = 82476467981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91066402577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45533201286 + 45533201287.

It is an arithmetic number, because the mean of its divisors is an integer number (45533201287).

Almost surely, 2^91066402573 is an apocalyptic number.

It is an amenable number.

91066402573 is a deficient number, since it is larger than the sum of its proper divisors (1).

91066402573 is an equidigital number, since it uses as much as digits as its factorization.

91066402573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 91066402573 in words is "ninety-one billion, sixty-six million, four hundred two thousand, five hundred seventy-three".