6666057216 has 480 divisors, whose sum is σ = 24751853280. Its totient is φ = 1755758592.

The previous prime is 6666057173. The next prime is 6666057217. The reversal of 6666057216 is 6127506666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666057217) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8805510 + ... + 8806266.

It is an arithmetic number, because the mean of its divisors is an integer number (51566361).

Almost surely, 2^6666057216 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 6666057216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12375926640).

6666057216 is an abundant number, since it is smaller than the sum of its proper divisors (18085796064).

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

6666057216 is a wasteful number, since it uses less digits than its factorization.

6666057216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811 (or 782 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 6666057216 is about 81645.9258995818. The cubic root of 6666057216 is about 1882.0147045108.

The spelling of 6666057216 in words is "six billion, six hundred sixty-six million, fifty-seven thousand, two hundred sixteen".