16620566 has 8 divisors (see below), whose sum is σ = 25113240. Its totient is φ = 8249488.

The previous prime is 16620553. The next prime is 16620587. The reversal of 16620566 is 66502661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30056 + ... + 30603.

It is an arithmetic number, because the mean of its divisors is an integer number (3139155).

Almost surely, 2^16620566 is an apocalyptic number.

16620566 is a deficient number, since it is larger than the sum of its proper divisors (8492674).

16620566 is a wasteful number, since it uses less digits than its factorization.

16620566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60798.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 16620566 is about 4076.8328393497. The cubic root of 16620566 is about 255.2007441434.

The spelling of 16620566 in words is "sixteen million, six hundred twenty thousand, five hundred sixty-six".