16661286 has 24 divisors (see below), whose sum is σ = 36610704. Its totient is φ = 5475120.

The previous prime is 16661261. The next prime is 16661287. The reversal of 16661286 is 68216661.

It is a self number, because there is not a number n which added to its sum of digits gives 16661286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16661287) 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, 5241 + ... + 7796.

It is an arithmetic number, because the mean of its divisors is an integer number (1525446).

Almost surely, 2^16661286 is an apocalyptic number.

16661286 is an abundant number, since it is smaller than the sum of its proper divisors (19949418).

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

16661286 is a wasteful number, since it uses less digits than its factorization.

16661286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13116 (or 13113 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 16661286 is about 4081.8238570521. The cubic root of 16661286 is about 255.4089861351.

The spelling of 16661286 in words is "sixteen million, six hundred sixty-one thousand, two hundred eighty-six".