6691229576064 has 960 divisors, whose sum is σ = 22337341488000. Its totient is φ = 1986475898880.

The previous prime is 6691229576021. The next prime is 6691229576069. The reversal of 6691229576064 is 4606759221966.

6691229576064 is a `hidden beast` number, since 6 + 6 + 9 + 12 + 2 + 9 + 5 + 7 + 606 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 6691229575992 and 6691229576010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6691229576069) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 18638522317 + ... + 18638522675.

It is an arithmetic number, because the mean of its divisors is an integer number (23268064050).

Almost surely, 2^{6691229576064} is an apocalyptic number.

6691229576064 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 6691229576064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11168670744000).

6691229576064 is an abundant number, since it is smaller than the sum of its proper divisors (15646111911936).

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

6691229576064 is a wasteful number, since it uses less digits than its factorization.

6691229576064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 58786560, while the sum is 63.

The spelling of 6691229576064 in words is "six trillion, six hundred ninety-one billion, two hundred twenty-nine million, five hundred seventy-six thousand, sixty-four".