6646769870832 has 480 divisors, whose sum is σ = 23907575817216. Its totient is φ = 1675532390400.

The previous prime is 6646769870749. The next prime is 6646769870849. The reversal of 6646769870832 is 2380789676466.

6646769870832 is a `hidden beast` number, since 6 + 6 + 467 + 6 + 9 + 87 + 0 + 83 + 2 = 666.

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 95 ways as a sum of consecutive naturals, for example, 446354107 + ... + 446368997.

Almost surely, 2^{6646769870832} 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 6646769870832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11953787908608).

6646769870832 is an abundant number, since it is smaller than the sum of its proper divisors (17260805946384).

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

6646769870832 is a wasteful number, since it uses less digits than its factorization.

6646769870832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16429 (or 16420 counting only the distinct ones).

The product of its (nonzero) digits is 877879296, while the sum is 72.

The spelling of 6646769870832 in words is "six trillion, six hundred forty-six billion, seven hundred sixty-nine million, eight hundred seventy thousand, eight hundred thirty-two".