6663215978496 has 2304 divisors, whose sum is σ = 26824307328000. Its totient is φ = 1540525916160.

The previous prime is 6663215978453. The next prime is 6663215978557. The reversal of 6663215978496 is 6948795123666.

It is a tau number, because it is divible by the number of its divisors (2304).

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

Its product of digits (705438720) is a multiple of the sum of its prime factors (288).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 62273046475 + ... + 62273046581.

It is an arithmetic number, because the mean of its divisors is an integer number (11642494500).

Almost surely, 2^{6663215978496} is an apocalyptic number.

6663215978496 is a gapful number since it is divisible by the number (66) 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 6663215978496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13412153664000).

6663215978496 is an abundant number, since it is smaller than the sum of its proper divisors (20161091349504).

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

6663215978496 is a wasteful number, since it uses less digits than its factorization.

6663215978496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288 (or 265 counting only the distinct ones).

The product of its digits is 705438720, while the sum is 72.

The spelling of 6663215978496 in words is "six trillion, six hundred sixty-three billion, two hundred fifteen million, nine hundred seventy-eight thousand, four hundred ninety-six".