16566140 has 24 divisors (see below), whose sum is σ = 34883520. Its totient is φ = 6608448.

The previous prime is 16566131. The next prime is 16566181. The reversal of 16566140 is 4166561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8366 + ... + 10154.

It is an arithmetic number, because the mean of its divisors is an integer number (1453480).

Almost surely, 2^16566140 is an apocalyptic number.

16566140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16566140 is an abundant number, since it is smaller than the sum of its proper divisors (18317380).

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

16566140 is a wasteful number, since it uses less digits than its factorization.

16566140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261 (or 2259 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 16566140 is about 4070.1523313016. The cubic root of 16566140 is about 254.9218779015.

The spelling of 16566140 in words is "sixteen million, five hundred sixty-six thousand, one hundred forty".