16407666 has 48 divisors (see below), whose sum is σ = 39087360. Its totient is φ = 4932960.

The previous prime is 16407641. The next prime is 16407673. The reversal of 16407666 is 66670461.

It is a self number, because there is not a number n which added to its sum of digits gives 16407666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34015 + ... + 34493.

It is an arithmetic number, because the mean of its divisors is an integer number (814320).

Almost surely, 2^16407666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16407666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19543680).

16407666 is an abundant number, since it is smaller than the sum of its proper divisors (22679694).

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

16407666 is a wasteful number, since it uses less digits than its factorization.

16407666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 16407666 is about 4050.6377275683. The cubic root of 16407666 is about 254.1063993032.

The spelling of 16407666 in words is "sixteen million, four hundred seven thousand, six hundred sixty-six".