6621328231266 has 128 divisors (see below), whose sum is σ = 15881153826816. Its totient is φ = 1799403724800.

The previous prime is 6621328231207. The next prime is 6621328231363.

6621328231266 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 531528510 + ... + 531540966.

It is an arithmetic number, because the mean of its divisors is an integer number (124071514272).

Almost surely, 2^{6621328231266} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6621328231266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7940576913408).

6621328231266 is an abundant number, since it is smaller than the sum of its proper divisors (9259825595550).

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

6621328231266 is a wasteful number, since it uses less digits than its factorization.

6621328231266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15536.

The product of its digits is 1492992, while the sum is 48.

The spelling of 6621328231266 in words is "six trillion, six hundred twenty-one billion, three hundred twenty-eight million, two hundred thirty-one thousand, two hundred sixty-six".