6621086016 has 224 divisors, whose sum is σ = 20712257280. Its totient is φ = 2066890752.

The previous prime is 6621085987. The next prime is 6621086039. The reversal of 6621086016 is 6106801266.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7725460 + ... + 7726316.

Almost surely, 2^6621086016 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 6621086016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10356128640).

6621086016 is an abundant number, since it is smaller than the sum of its proper divisors (14091171264).

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

6621086016 is a wasteful number, since it uses less digits than its factorization.

6621086016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158 (or 1142 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 6621086016 is about 81370.0560157113. The cubic root of 6621086016 is about 1877.7729415491.

The spelling of 6621086016 in words is "six billion, six hundred twenty-one million, eighty-six thousand, sixteen".