16655560506 has 24 divisors (see below), whose sum is σ = 38862975060. Its totient is φ = 5124787776.

The previous prime is 16655560487. The next prime is 16655560511. The reversal of 16655560506 is 60506555661.

It can be written as a sum of positive squares in 2 ways, for example, as 16561373481 + 94187025 = 128691^2 + 9705^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35588571 + ... + 35589038.

Almost surely, 2^16655560506 is an apocalyptic number.

16655560506 is an abundant number, since it is smaller than the sum of its proper divisors (22207414554).

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

16655560506 is a wasteful number, since it uses less digits than its factorization.

16655560506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71177630 (or 71177627 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The spelling of 16655560506 in words is "sixteen billion, six hundred fifty-five million, five hundred sixty thousand, five hundred six".