6619802040 has 384 divisors, whose sum is σ = 24018508800. Its totient is φ = 1572679680.

The previous prime is 6619802039. The next prime is 6619802041. The reversal of 6619802040 is 402089166.

It is an interprime number because it is at equal distance from previous prime (6619802039) and next prime (6619802041).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6619801986 and 6619802004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6619802041) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18439381 + ... + 18439739.

It is an arithmetic number, because the mean of its divisors is an integer number (62548200).

Almost surely, 2^6619802040 is an apocalyptic number.

6619802040 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 6619802040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12009254400).

6619802040 is an abundant number, since it is smaller than the sum of its proper divisors (17398706760).

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

6619802040 is a wasteful number, since it uses less digits than its factorization.

6619802040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 6619802040 is about 81362.1659003741. The cubic root of 6619802040 is about 1877.6515530412.

The spelling of 6619802040 in words is "six billion, six hundred nineteen million, eight hundred two thousand, forty".