15666000017 has 2 divisors, whose sum is σ = 15666000018. Its totient is φ = 15666000016.

The previous prime is 15665999989. The next prime is 15666000019. The reversal of 15666000017 is 71000066651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15545351761 + 120648256 = 124681^2 + 10984^2 .

It is a cyclic number.

It is not a de Polignac number, because 15666000017 - 2¹² = 15665995921 is a prime.

Together with 15666000019, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15666000019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7833000008 + 7833000009.

It is an arithmetic number, because the mean of its divisors is an integer number (7833000009).

Almost surely, 2^15666000017 is an apocalyptic number.

It is an amenable number.

15666000017 is a deficient number, since it is larger than the sum of its proper divisors (1).

15666000017 is an equidigital number, since it uses as much as digits as its factorization.

15666000017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

Adding to 15666000017 its reverse (71000066651), we get a palindrome (86666066668).

The spelling of 15666000017 in words is "fifteen billion, six hundred sixty-six million, seventeen", and thus it is an aban number.