16668774 has 16 divisors (see below), whose sum is σ = 37041840. Its totient is φ = 5556240.

The previous prime is 16668749. The next prime is 16668791. The reversal of 16668774 is 47786661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154287 + ... + 154394.

It is an arithmetic number, because the mean of its divisors is an integer number (2315115).

Almost surely, 2^16668774 is an apocalyptic number.

16668774 is an abundant number, since it is smaller than the sum of its proper divisors (20373066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16668774 is a wasteful number, since it uses less digits than its factorization.

16668774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308692 (or 308686 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 16668774 is about 4082.7409910500. The cubic root of 16668774 is about 255.4472428069.

It can be divided in two parts, 1666 and 8774, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 16668774 in words is "sixteen million, six hundred sixty-eight thousand, seven hundred seventy-four".