999666306 has 32 divisors (see below), whose sum is σ = 2223518400. Its totient is φ = 332916480.

The previous prime is 999666293. The next prime is 999666341. The reversal of 999666306 is 603666999.

999666306 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55330 + ... + 71138.

It is an arithmetic number, because the mean of its divisors is an integer number (69484950).

Almost surely, 2^999666306 is an apocalyptic number.

It is a pronic number, being equal to 31617×31618.

999666306 is an abundant number, since it is smaller than the sum of its proper divisors (1223852094).

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

999666306 is a wasteful number, since it uses less digits than its factorization.

999666306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16991 (or 16985 counting only the distinct ones).

The product of its (nonzero) digits is 2834352, while the sum is 54.

The square root of 999666306 is about 31617.4999960465. The cubic root of 999666306 is about 999.8887562920. Note that the first 3 decimals are identical.

The spelling of 999666306 in words is "nine hundred ninety-nine million, six hundred sixty-six thousand, three hundred six".