320666973 has 16 divisors (see below), whose sum is σ = 467673600. Its totient is φ = 193823280.

The previous prime is 320666963. The next prime is 320666977. The reversal of 320666973 is 379666023.

It is not a de Polignac number, because 320666973 - 2¹⁰ = 320665949 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320666977) 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, 313 + ... + 25326.

It is an arithmetic number, because the mean of its divisors is an integer number (29229600).

Almost surely, 2^320666973 is an apocalyptic number.

320666973 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

320666973 is a deficient number, since it is larger than the sum of its proper divisors (147006627).

320666973 is a wasteful number, since it uses less digits than its factorization.

320666973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26032.

The product of its (nonzero) digits is 244944, while the sum is 42.

The square root of 320666973 is about 17907.1765781209. The cubic root of 320666973 is about 684.4652604707.

The spelling of 320666973 in words is "three hundred twenty million, six hundred sixty-six thousand, nine hundred seventy-three".