16566272 has 24 divisors (see below), whose sum is σ = 33128550. Its totient is φ = 8282112.

The previous prime is 16566259. The next prime is 16566281. The reversal of 16566272 is 27266561.

It can be written as a sum of positive squares in only one way, i.e., 16516096 + 50176 = 4064^2 + 224^2 .

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1997 + ... + 6092.

Almost surely, 2^16566272 is an apocalyptic number.

It is an amenable number.

16566272 is a deficient number, since it is larger than the sum of its proper divisors (16562278).

16566272 is an frugal number, since it uses more digits than its factorization.

16566272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8111 (or 8091 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 16566272 is about 4070.1685468786. The cubic root of 16566272 is about 254.9225549773.

The spelling of 16566272 in words is "sixteen million, five hundred sixty-six thousand, two hundred seventy-two".