16606651657 has 2 divisors, whose sum is σ = 16606651658. Its totient is φ = 16606651656.

The previous prime is 16606651631. The next prime is 16606651673. The reversal of 16606651657 is 75615660661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15591018496 + 1015633161 = 124864^2 + 31869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16606651657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16606651657.

It is not a weakly prime, because it can be changed into another prime (16606651697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8303325828 + 8303325829.

It is an arithmetic number, because the mean of its divisors is an integer number (8303325829).

Almost surely, 2^16606651657 is an apocalyptic number.

It is an amenable number.

16606651657 is a deficient number, since it is larger than the sum of its proper divisors (1).

16606651657 is an equidigital number, since it uses as much as digits as its factorization.

16606651657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The spelling of 16606651657 in words is "sixteen billion, six hundred six million, six hundred fifty-one thousand, six hundred fifty-seven".