16065727021 has 2 divisors, whose sum is σ = 16065727022. Its totient is φ = 16065727020.

The previous prime is 16065726997. The next prime is 16065727049. The reversal of 16065727021 is 12072756061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15521671396 + 544055625 = 124586^2 + 23325^2 .

It is a cyclic number.

It is not a de Polignac number, because 16065727021 - 2²³ = 16057338413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16065727061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8032863510 + 8032863511.

It is an arithmetic number, because the mean of its divisors is an integer number (8032863511).

Almost surely, 2^16065727021 is an apocalyptic number.

It is an amenable number.

16065727021 is a deficient number, since it is larger than the sum of its proper divisors (1).

16065727021 is an equidigital number, since it uses as much as digits as its factorization.

16065727021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 16065727021 in words is "sixteen billion, sixty-five million, seven hundred twenty-seven thousand, twenty-one".