16620722072 has 8 divisors (see below), whose sum is σ = 31163853900. Its totient is φ = 8310361032.

The previous prime is 16620722009. The next prime is 16620722081. The reversal of 16620722072 is 27022702661.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent 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 as a sum of consecutive naturals, namely, 1038795122 + ... + 1038795137.

Almost surely, 2^16620722072 is an apocalyptic number.

It is an amenable number.

16620722072 is a deficient number, since it is larger than the sum of its proper divisors (14543131828).

16620722072 is a wasteful number, since it uses less digits than its factorization.

16620722072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077590265 (or 2077590261 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The spelling of 16620722072 in words is "sixteen billion, six hundred twenty million, seven hundred twenty-two thousand, seventy-two".