6321256668 has 36 divisors (see below), whose sum is σ = 16035219928. Its totient is φ = 2099636640.

The previous prime is 6321256663. The next prime is 6321256673. The reversal of 6321256668 is 8666521236.

It is an interprime number because it is at equal distance from previous prime (6321256663) and next prime (6321256673).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6321256663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 300043 + ... + 320418.

Almost surely, 2^6321256668 is an apocalyptic number.

It is an amenable number.

6321256668 is an abundant number, since it is smaller than the sum of its proper divisors (9713963260).

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

6321256668 is a wasteful number, since it uses less digits than its factorization.

6321256668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620754 (or 620749 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 6321256668 is about 79506.3309931983. The cubic root of 6321256668 is about 1848.9896277870.

The spelling of 6321256668 in words is "six billion, three hundred twenty-one million, two hundred fifty-six thousand, six hundred sixty-eight".