999986066 has 16 divisors (see below), whose sum is σ = 1515114456. Its totient is φ = 494971776.

The previous prime is 999986059. The next prime is 999986069. The reversal of 999986066 is 660689999.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 655104025 + 344882041 = 25595^2 + 18571^2 .

It is not an unprimeable number, because it can be changed into a prime (999986069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81230 + ... + 92726.

Almost surely, 2^999986066 is an apocalyptic number.

999986066 is a deficient number, since it is larger than the sum of its proper divisors (515128390).

999986066 is a wasteful number, since it uses less digits than its factorization.

999986066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11933.

The product of its (nonzero) digits is 11337408, while the sum is 62.

The square root of 999986066 is about 31622.5562850317. The cubic root of 999986066 is about 999.9953553118.

The spelling of 999986066 in words is "nine hundred ninety-nine million, nine hundred eighty-six thousand, sixty-six".