16626020006556 has 72 divisors (see below), whose sum is σ = 42406125128640. Its totient is φ = 5492013778944.

The previous prime is 16626020006549. The next prime is 16626020006611. The reversal of 16626020006556 is 65560002062661.

It is a happy number.

16626020006556 is a `hidden beast` number, since 16 + 6 + 2 + 60 + 20 + 0 + 0 + 6 + 556 = 666.

It is a super-2 number, since 2×16626020006556² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23403076 + ... + 24103028.

It is an arithmetic number, because the mean of its divisors is an integer number (588973960120).

Almost surely, 2^{16626020006556} is an apocalyptic number.

It is an amenable number.

16626020006556 is an abundant number, since it is smaller than the sum of its proper divisors (25780105122084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16626020006556 is a wasteful number, since it uses less digits than its factorization.

16626020006556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705915 (or 705910 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 16626020006556 in words is "sixteen trillion, six hundred twenty-six billion, twenty million, six thousand, five hundred fifty-six".