6655411783440 has 640 divisors, whose sum is σ = 26325915033600. Its totient is φ = 1513891399680.

The previous prime is 6655411783393. The next prime is 6655411783451. The reversal of 6655411783440 is 443871145566.

6655411783440 is a `hidden beast` number, since 6 + 6 + 5 + 5 + 4 + 117 + 83 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4269025381 + ... + 4269026939.

It is an arithmetic number, because the mean of its divisors is an integer number (41134242240).

Almost surely, 2^{6655411783440} is an apocalyptic number.

6655411783440 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 6655411783440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13162957516800).

6655411783440 is an abundant number, since it is smaller than the sum of its proper divisors (19670503250160).

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

6655411783440 is a wasteful number, since it uses less digits than its factorization.

6655411783440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2772 (or 2760 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 6655411783440 in words is "six trillion, six hundred fifty-five billion, four hundred eleven million, seven hundred eighty-three thousand, four hundred forty".