16366686 has 48 divisors (see below), whose sum is σ = 38413440. Its totient is φ = 4635120.

The previous prime is 16366681. The next prime is 16366697. The reversal of 16366686 is 68666361.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16366681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52471 + ... + 52781.

It is an arithmetic number, because the mean of its divisors is an integer number (800280).

Almost surely, 2^16366686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16366686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19206720).

16366686 is an abundant number, since it is smaller than the sum of its proper divisors (22046754).

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

16366686 is a wasteful number, since it uses less digits than its factorization.

16366686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509 (or 502 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 16366686 is about 4045.5761023617. The cubic root of 16366686 is about 253.8946697832.

The spelling of 16366686 in words is "sixteen million, three hundred sixty-six thousand, six hundred eighty-six".