16187066657 has 2 divisors, whose sum is σ = 16187066658. Its totient is φ = 16187066656.

The previous prime is 16187066653. The next prime is 16187066699. The reversal of 16187066657 is 75666078161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10016807056 + 6170259601 = 100084^2 + 78551^2 .

It is a cyclic number.

It is not a de Polignac number, because 16187066657 - 2² = 16187066653 is a prime.

It is a super-2 number, since 2×16187066657² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16187066599 and 16187066608.

It is not a weakly prime, because it can be changed into another prime (16187066653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8093533328 + 8093533329.

It is an arithmetic number, because the mean of its divisors is an integer number (8093533329).

Almost surely, 2^16187066657 is an apocalyptic number.

It is an amenable number.

16187066657 is a deficient number, since it is larger than the sum of its proper divisors (1).

16187066657 is an equidigital number, since it uses as much as digits as its factorization.

16187066657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 16187066657 in words is "sixteen billion, one hundred eighty-seven million, sixty-six thousand, six hundred fifty-seven".