16628774322663 has 16 divisors (see below), whose sum is σ = 24665154691840. Its totient is φ = 11072379485592.

The previous prime is 16628774322647. The next prime is 16628774322691. The reversal of 16628774322663 is 36622347782661.

16628774322663 is a `hidden beast` number, since 1 + 6 + 6 + 287 + 74 + 3 + 226 + 63 = 666.

It is not a de Polignac number, because 16628774322663 - 2⁴ = 16628774322647 is a prime.

It is a super-2 number, since 2×16628774322663² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16628774322663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16628774322163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374145781 + ... + 374190222.

It is an arithmetic number, because the mean of its divisors is an integer number (1541572168240).

Almost surely, 2^{16628774322663} is an apocalyptic number.

16628774322663 is a deficient number, since it is larger than the sum of its proper divisors (8036380369177).

16628774322663 is an equidigital number, since it uses as much as digits as its factorization.

16628774322663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748336835 (or 748336829 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 63.

The spelling of 16628774322663 in words is "sixteen trillion, six hundred twenty-eight billion, seven hundred seventy-four million, three hundred twenty-two thousand, six hundred sixty-three".