6626019840 has 320 divisors, whose sum is σ = 23684234112. Its totient is φ = 1566310400.

The previous prime is 6626019823. The next prime is 6626019859. The reversal of 6626019840 is 489106266.

It is a tau number, because it is divible by the number of its divisors (320).

It is a junction number, because it is equal to n+sod(n) for n = 6626019792 and 6626019801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3462724 + ... + 3464636.

Almost surely, 2^6626019840 is an apocalyptic number.

6626019840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6626019840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11842117056).

6626019840 is an abundant number, since it is smaller than the sum of its proper divisors (17058214272).

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

6626019840 is a wasteful number, since it uses less digits than its factorization.

6626019840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991 (or 1975 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 6626019840 is about 81400.3675667377. The cubic root of 6626019840 is about 1878.2392447561.

The spelling of 6626019840 in words is "six billion, six hundred twenty-six million, nineteen thousand, eight hundred forty".