16656021208 has 64 divisors (see below), whose sum is σ = 32282219520. Its totient is φ = 8052777600.

The previous prime is 16656021181. The next prime is 16656021227. The reversal of 16656021208 is 80212065661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22416885 + ... + 22417627.

It is an arithmetic number, because the mean of its divisors is an integer number (504409680).

Almost surely, 2^16656021208 is an apocalyptic number.

It is an amenable number.

16656021208 is a deficient number, since it is larger than the sum of its proper divisors (15626198312).

16656021208 is a wasteful number, since it uses less digits than its factorization.

16656021208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528 (or 1524 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

Adding to 16656021208 its reverse (80212065661), we get a palindrome (96868086869).

The spelling of 16656021208 in words is "sixteen billion, six hundred fifty-six million, twenty-one thousand, two hundred eight".