6626536644 has 144 divisors (see below), whose sum is σ = 19422993408. Its totient is φ = 1721326464.

The previous prime is 6626536633. The next prime is 6626536663. The reversal of 6626536644 is 4466356266.

It is a super-3 number, since 3×6626536644³ (a number of 30 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6626536593 and 6626536602.

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 47 ways as a sum of consecutive naturals, for example, 947649 + ... + 954615.

Almost surely, 2^6626536644 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 6626536644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9711496704).

6626536644 is an abundant number, since it is smaller than the sum of its proper divisors (12796456764).

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

6626536644 is a wasteful number, since it uses less digits than its factorization.

6626536644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7074 (or 7059 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 48.

The square root of 6626536644 is about 81403.5419622512. The cubic root of 6626536644 is about 1878.2880752930.

The spelling of 6626536644 in words is "six billion, six hundred twenty-six million, five hundred thirty-six thousand, six hundred forty-four".