6663695081472 has 1680 divisors, whose sum is σ = 24946882706592. Its totient is φ = 1754325319680.

The previous prime is 6663695081441. The next prime is 6663695081521. The reversal of 6663695081472 is 2741805963666.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 391982063608 + ... + 391982063624.

It is a 1-persistent number, because it is pandigital, but 2⋅6663695081472 = 13327390162944 is not.

Almost surely, 2^{6663695081472} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6663695081472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12473441353296).

6663695081472 is an abundant number, since it is smaller than the sum of its proper divisors (18283187625120).

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

6663695081472 is an frugal number, since it uses more digits than its factorization.

6663695081472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 78382080, while the sum is 63.

The spelling of 6663695081472 in words is "six trillion, six hundred sixty-three billion, six hundred ninety-five million, eighty-one thousand, four hundred seventy-two".