320666684 has 18 divisors (see below), whose sum is σ = 607655160. Its totient is φ = 147999696.

The previous prime is 320666677. The next prime is 320666693. The reversal of 320666684 is 486666023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 236504 + ... + 237855.

It is an arithmetic number, because the mean of its divisors is an integer number (33758620).

Almost surely, 2^320666684 is an apocalyptic number.

It is an amenable number.

320666684 is a deficient number, since it is larger than the sum of its proper divisors (286988476).

320666684 is a wasteful number, since it uses less digits than its factorization.

320666684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474389 (or 474374 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 41.

The square root of 320666684 is about 17907.1685087286. The cubic root of 320666684 is about 684.4650548467.

The spelling of 320666684 in words is "three hundred twenty million, six hundred sixty-six thousand, six hundred eighty-four".