16566772 has 48 divisors (see below), whose sum is σ = 32901120. Its totient is φ = 7257600.

The previous prime is 16566761. The next prime is 16566779. The reversal of 16566772 is 27766561.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16566779) 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, 60997 + ... + 61267.

It is an arithmetic number, because the mean of its divisors is an integer number (685440).

Almost surely, 2^16566772 is an apocalyptic number.

It is an amenable number.

16566772 is a deficient number, since it is larger than the sum of its proper divisors (16334348).

16566772 is a wasteful number, since it uses less digits than its factorization.

16566772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352 (or 350 counting only the distinct ones).

The product of its digits is 105840, while the sum is 40.

The square root of 16566772 is about 4070.2299689330. The cubic root of 16566772 is about 254.9251196258.

The spelling of 16566772 in words is "sixteen million, five hundred sixty-six thousand, seven hundred seventy-two".