6666438822280 has 32 divisors (see below), whose sum is σ = 14999976474840. Its totient is φ = 2666488573440.

The previous prime is 6666438822229. The next prime is 6666438822299. The reversal of 6666438822280 is 822288346666.

It can be written as a sum of positive squares in 4 ways, for example, as 4948551517156 + 1717887305124 = 2224534^2 + 1310682^2 .

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1468299 + ... + 3935578.

Almost surely, 2^{6666438822280} is an apocalyptic number.

It is an amenable number.

6666438822280 is an abundant number, since it is smaller than the sum of its proper divisors (8333537652560).

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

6666438822280 is a wasteful number, since it uses less digits than its factorization.

6666438822280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5434729 (or 5434725 counting only the distinct ones).

The product of its (nonzero) digits is 63700992, while the sum is 61.

The spelling of 6666438822280 in words is "six trillion, six hundred sixty-six billion, four hundred thirty-eight million, eight hundred twenty-two thousand, two hundred eighty".