320866666900 has 72 divisors (see below), whose sum is σ = 750413220480. Its totient is φ = 118383392640.

The previous prime is 320866666877. The next prime is 320866666919. The reversal of 320866666900 is 9666668023.

It is a happy number.

It is a super-2 number, since 2×320866666900² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1621137 + ... + 1808263.

It is an arithmetic number, because the mean of its divisors is an integer number (10422405840).

Almost surely, 2^320866666900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320866666900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375206610240).

320866666900 is an abundant number, since it is smaller than the sum of its proper divisors (429546553580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320866666900 is a wasteful number, since it uses less digits than its factorization.

320866666900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188473 (or 188466 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 52.

The spelling of 320866666900 in words is "three hundred twenty billion, eight hundred sixty-six million, six hundred sixty-six thousand, nine hundred".