16966639 has 12 divisors (see below), whose sum is σ = 18339816. Its totient is φ = 15685488.

The previous prime is 16966633. The next prime is 16966667. The reversal of 16966639 is 93666961.

It is not a de Polignac number, because 16966639 - 2⁹ = 16966127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16966633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14977 + ... + 16069.

It is an arithmetic number, because the mean of its divisors is an integer number (1528318).

Almost surely, 2^16966639 is an apocalyptic number.

16966639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

16966639 is a deficient number, since it is larger than the sum of its proper divisors (1373177).

16966639 is a wasteful number, since it uses less digits than its factorization.

16966639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174 (or 1155 counting only the distinct ones).

The product of its digits is 314928, while the sum is 46.

The square root of 16966639 is about 4119.0580233835. The cubic root of 16966639 is about 256.9598518136.

The spelling of 16966639 in words is "sixteen million, nine hundred sixty-six thousand, six hundred thirty-nine".