6655519954944 has 864 divisors, whose sum is σ = 23686341719040. Its totient is φ = 1860797546496.

The previous prime is 6655519954901. The next prime is 6655519954961. The reversal of 6655519954944 is 4494599155566.

It is a happy number.

6655519954944 is a `hidden beast` number, since 6 + 6 + 55 + 519 + 9 + 54 + 9 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1146117289 + ... + 1146123095.

It is an arithmetic number, because the mean of its divisors is an integer number (27414747360).

Almost surely, 2^{6655519954944} is an apocalyptic number.

6655519954944 is a gapful number since it is divisible by the number (64) 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 6655519954944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11843170859520).

6655519954944 is an abundant number, since it is smaller than the sum of its proper divisors (17030821764096).

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

6655519954944 is an equidigital number, since it uses as much as digits as its factorization.

6655519954944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5905 (or 5866 counting only the distinct ones).

The product of its digits is 1049760000, while the sum is 72.

The spelling of 6655519954944 in words is "six trillion, six hundred fifty-five billion, five hundred nineteen million, nine hundred fifty-four thousand, nine hundred forty-four".