90466166725981 has 2 divisors, whose sum is σ = 90466166725982. Its totient is φ = 90466166725980.

The previous prime is 90466166725943. The next prime is 90466166726021. The reversal of 90466166725981 is 18952766166409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78981150733956 + 11485015992025 = 8887134^2 + 3388955^2 .

It is a cyclic number.

It is not a de Polignac number, because 90466166725981 - 2²⁵ = 90466133171549 is a prime.

It is a super-2 number, since 2×90466166725981² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90466166725981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90466166726981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45233083362990 + 45233083362991.

It is an arithmetic number, because the mean of its divisors is an integer number (45233083362991).

Almost surely, 2^{90466166725981} is an apocalyptic number.

It is an amenable number.

90466166725981 is a deficient number, since it is larger than the sum of its proper divisors (1).

90466166725981 is an equidigital number, since it uses as much as digits as its factorization.

90466166725981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 235146240, while the sum is 70.

The spelling of 90466166725981 in words is "ninety trillion, four hundred sixty-six billion, one hundred sixty-six million, seven hundred twenty-five thousand, nine hundred eighty-one".