320666471 has 2 divisors, whose sum is σ = 320666472. Its totient is φ = 320666470.

The previous prime is 320666431. The next prime is 320666473. The reversal of 320666471 is 174666023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320666471 - 2²⁶ = 253557607 is a prime.

It is a super-3 number, since 3×320666471³ (a number of 26 digits) contains 333 as substring.

Together with 320666473, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320666473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160333235 + 160333236.

It is an arithmetic number, because the mean of its divisors is an integer number (160333236).

Almost surely, 2^320666471 is an apocalyptic number.

320666471 is a deficient number, since it is larger than the sum of its proper divisors (1).

320666471 is an equidigital number, since it uses as much as digits as its factorization.

320666471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 320666471 is about 17907.1625613887. The cubic root of 320666471 is about 684.4649032967.

The spelling of 320666471 in words is "three hundred twenty million, six hundred sixty-six thousand, four hundred seventy-one".