16566505136664 has 128 divisors (see below), whose sum is σ = 50288419814400. Its totient is φ = 4446554918400.

The previous prime is 16566505136663. The next prime is 16566505136683. The reversal of 16566505136664 is 46663150566561.

It is a super-2 number, since 2×16566505136664² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16566505136598 and 16566505136607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16566505136663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45770412 + ... + 46130939.

It is an arithmetic number, because the mean of its divisors is an integer number (392878279800).

Almost surely, 2^{16566505136664} is an apocalyptic number.

16566505136664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16566505136664 is an abundant number, since it is smaller than the sum of its proper divisors (33721914677736).

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

16566505136664 is a wasteful number, since it uses less digits than its factorization.

16566505136664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91901433 (or 91901429 counting only the distinct ones).

The product of its (nonzero) digits is 69984000, while the sum is 60.

The spelling of 16566505136664 in words is "sixteen trillion, five hundred sixty-six billion, five hundred five million, one hundred thirty-six thousand, six hundred sixty-four".