16656166 has 4 divisors (see below), whose sum is σ = 24984252. Its totient is φ = 8328082.

The previous prime is 16656139. The next prime is 16656169. The reversal of 16656166 is 66165661.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16656169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4164040 + ... + 4164043.

It is an arithmetic number, because the mean of its divisors is an integer number (6246063).

Almost surely, 2^16656166 is an apocalyptic number.

16656166 is a deficient number, since it is larger than the sum of its proper divisors (8328086).

16656166 is an equidigital number, since it uses as much as digits as its factorization.

16656166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8328085.

The product of its digits is 38880, while the sum is 37.

The square root of 16656166 is about 4081.1966382423. The cubic root of 16656166 is about 255.3828211283.

The spelling of 16656166 in words is "sixteen million, six hundred fifty-six thousand, one hundred sixty-six".