16622661663 has 6 divisors (see below), whose sum is σ = 24010511304. Its totient is φ = 11081774436.

The previous prime is 16622661617. The next prime is 16622661677. The reversal of 16622661663 is 36616622661.

16622661663 is a `hidden beast` number, since 1 + 6 + 6 + 2 + 26 + 616 + 6 + 3 = 666.

It is not a de Polignac number, because 16622661663 - 2¹³ = 16622653471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16622665663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 923481195 + ... + 923481212.

It is an arithmetic number, because the mean of its divisors is an integer number (4001751884).

Almost surely, 2^16622661663 is an apocalyptic number.

16622661663 is a deficient number, since it is larger than the sum of its proper divisors (7387849641).

16622661663 is a wasteful number, since it uses less digits than its factorization.

16622661663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846962413 (or 1846962410 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The spelling of 16622661663 in words is "sixteen billion, six hundred twenty-two million, six hundred sixty-one thousand, six hundred sixty-three".