6626344240 has 80 divisors (see below), whose sum is σ = 16740357120. Its totient is φ = 2430017280.

The previous prime is 6626344223. The next prime is 6626344243. The reversal of 6626344240 is 424436266.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 6626344240.

It is not an unprimeable number, because it can be changed into a prime (6626344243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23194 + ... + 117433.

It is an arithmetic number, because the mean of its divisors is an integer number (209254464).

Almost surely, 2^6626344240 is an apocalyptic number.

It is an amenable number.

6626344240 is an abundant number, since it is smaller than the sum of its proper divisors (10114012880).

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

6626344240 is a wasteful number, since it uses less digits than its factorization.

6626344240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140690 (or 140684 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 37.

The square root of 6626344240 is about 81402.3601623442. The cubic root of 6626344240 is about 1878.2698961820.

The spelling of 6626344240 in words is "six billion, six hundred twenty-six million, three hundred forty-four thousand, two hundred forty".