16656656249 has 8 divisors (see below), whose sum is σ = 17161622280. Its totient is φ = 16158752896.

The previous prime is 16656656207. The next prime is 16656656251. The reversal of 16656656249 is 94265665661.

It can be written as a sum of positive squares in 4 ways, for example, as 6259183225 + 10397473024 = 79115^2 + 101968^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16656656249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16656656194 and 16656656203.

It is not an unprimeable number, because it can be changed into a prime (16656656749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1760882 + ... + 1770315.

It is an arithmetic number, because the mean of its divisors is an integer number (2145202785).

Almost surely, 2^16656656249 is an apocalyptic number.

It is an amenable number.

16656656249 is a deficient number, since it is larger than the sum of its proper divisors (504966031).

16656656249 is an equidigital number, since it uses as much as digits as its factorization.

16656656249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3531339.

The product of its digits is 13996800, while the sum is 56.

The spelling of 16656656249 in words is "sixteen billion, six hundred fifty-six million, six hundred fifty-six thousand, two hundred forty-nine".