320664467 has 4 divisors (see below), whose sum is σ = 321200400. Its totient is φ = 320128536.

The previous prime is 320664457. The next prime is 320664473. The reversal of 320664467 is 764466023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 320664467 - 2⁴ = 320664451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320664467.

It is not an unprimeable number, because it can be changed into a prime (320664457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267068 + ... + 268265.

It is an arithmetic number, because the mean of its divisors is an integer number (80300100).

Almost surely, 2^320664467 is an apocalyptic number.

320664467 is a deficient number, since it is larger than the sum of its proper divisors (535933).

320664467 is an equidigital number, since it uses as much as digits as its factorization.

320664467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535932.

The product of its (nonzero) digits is 145152, while the sum is 38.

The square root of 320664467 is about 17907.1066060377. The cubic root of 320664467 is about 684.4634774429.

The spelling of 320664467 in words is "three hundred twenty million, six hundred sixty-four thousand, four hundred sixty-seven".