16566256254 has 48 divisors (see below), whose sum is σ = 35220380976. Its totient is φ = 5193676800.

The previous prime is 16566256249. The next prime is 16566256261. The reversal of 16566256254 is 45265266561.

It is a super-2 number, since 2×16566256254² (a number of 21 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, 3744964 + ... + 3749384.

It is an arithmetic number, because the mean of its divisors is an integer number (733757937).

Almost surely, 2^16566256254 is an apocalyptic number.

16566256254 is an abundant number, since it is smaller than the sum of its proper divisors (18654124722).

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

16566256254 is a wasteful number, since it uses less digits than its factorization.

16566256254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6621 (or 6604 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 48.

The spelling of 16566256254 in words is "sixteen billion, five hundred sixty-six million, two hundred fifty-six thousand, two hundred fifty-four".