16628688658 has 8 divisors (see below), whose sum is σ = 25082380080. Its totient is φ = 8267895300.

The previous prime is 16628688631. The next prime is 16628688667. The reversal of 16628688658 is 85688682661.

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

It is a self number, because there is not a number n which added to its sum of digits gives 16628688658.

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 3 ways as a sum of consecutive naturals, for example, 23224068 + ... + 23224783.

It is an arithmetic number, because the mean of its divisors is an integer number (3135297510).

Almost surely, 2^16628688658 is an apocalyptic number.

16628688658 is a deficient number, since it is larger than the sum of its proper divisors (8453691422).

16628688658 is a wasteful number, since it uses less digits than its factorization.

16628688658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46449032.

The product of its digits is 53084160, while the sum is 64.

The spelling of 16628688658 in words is "sixteen billion, six hundred twenty-eight million, six hundred eighty-eight thousand, six hundred fifty-eight".