320666983 has 16 divisors (see below), whose sum is σ = 396153856. Its totient is φ = 252758880.

The previous prime is 320666977. The next prime is 320666987. The reversal of 320666983 is 389666023.

It is a cyclic number.

It is not a de Polignac number, because 320666983 - 2⁹ = 320666471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320666987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18160 + ... + 31162.

It is an arithmetic number, because the mean of its divisors is an integer number (24759616).

Almost surely, 2^320666983 is an apocalyptic number.

320666983 is a deficient number, since it is larger than the sum of its proper divisors (75486873).

320666983 is a wasteful number, since it uses less digits than its factorization.

320666983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13294.

The product of its (nonzero) digits is 279936, while the sum is 43.

The square root of 320666983 is about 17907.1768573385. The cubic root of 320666983 is about 684.4652675857.

The spelling of 320666983 in words is "three hundred twenty million, six hundred sixty-six thousand, nine hundred eighty-three".