16656314225 has 24 divisors (see below), whose sum is σ = 21855422592. Its totient is φ = 12566153600.

The previous prime is 16656314219. The next prime is 16656314231. The reversal of 16656314225 is 52241365661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16656314219) and next prime (16656314231).

It is not a de Polignac number, because 16656314225 - 2¹⁴ = 16656297841 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 163172 + ... + 244821.

It is an arithmetic number, because the mean of its divisors is an integer number (910642608).

Almost surely, 2^16656314225 is an apocalyptic number.

It is an amenable number.

16656314225 is a deficient number, since it is larger than the sum of its proper divisors (5199108367).

16656314225 is a wasteful number, since it uses less digits than its factorization.

16656314225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408097 (or 408092 counting only the distinct ones).

The product of its digits is 259200, while the sum is 41.

Adding to 16656314225 its reverse (52241365661), we get a palindrome (68897679886).

The spelling of 16656314225 in words is "sixteen billion, six hundred fifty-six million, three hundred fourteen thousand, two hundred twenty-five".