320216666847 has 192 divisors, whose sum is σ = 564200017920. Its totient is φ = 156870604800.

The previous prime is 320216666773. The next prime is 320216666893. The reversal of 320216666847 is 748666612023.

It is a happy number.

It is not a de Polignac number, because 320216666847 - 2⁷ = 320216666719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320216666847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320216666897) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2444401972 + ... + 2444402102.

It is an arithmetic number, because the mean of its divisors is an integer number (2938541760).

Almost surely, 2^320216666847 is an apocalyptic number.

320216666847 is a deficient number, since it is larger than the sum of its proper divisors (243983351073).

320216666847 is a wasteful number, since it uses less digits than its factorization.

320216666847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 51.

The spelling of 320216666847 in words is "three hundred twenty billion, two hundred sixteen million, six hundred sixty-six thousand, eight hundred forty-seven".