36166798021 has 2 divisors, whose sum is σ = 36166798022. Its totient is φ = 36166798020.

The previous prime is 36166798007. The next prime is 36166798093. The reversal of 36166798021 is 12089766163.

36166798021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33065421921 + 3101376100 = 181839^2 + 55690^2 .

It is a cyclic number.

It is not a de Polignac number, because 36166798021 - 2¹⁹ = 36166273733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36166798321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18083399010 + 18083399011.

It is an arithmetic number, because the mean of its divisors is an integer number (18083399011).

Almost surely, 2^36166798021 is an apocalyptic number.

It is an amenable number.

36166798021 is a deficient number, since it is larger than the sum of its proper divisors (1).

36166798021 is an equidigital number, since it uses as much as digits as its factorization.

36166798021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 36166798021 in words is "thirty-six billion, one hundred sixty-six million, seven hundred ninety-eight thousand, twenty-one".