16666016 has 12 divisors (see below), whose sum is σ = 32811282. Its totient is φ = 8332992.

The previous prime is 16665953. The next prime is 16666019. The reversal of 16666016 is 61066661.

It can be written as a sum of positive squares in only one way, i.e., 10214416 + 6451600 = 3196^2 + 2540^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 520813 = 16666016 / (1 + 6 + 6 + 6 + 6 + 0 + 1 + 6).

It is not an unprimeable number, because it can be changed into a prime (16666019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260375 + ... + 260438.

Almost surely, 2^16666016 is an apocalyptic number.

16666016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16666016 is a deficient number, since it is larger than the sum of its proper divisors (16145266).

16666016 is an equidigital number, since it uses as much as digits as its factorization.

16666016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520823 (or 520815 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 16666016 is about 4082.4032137945. The cubic root of 16666016 is about 255.4331533412.

The spelling of 16666016 in words is "sixteen million, six hundred sixty-six thousand, sixteen".