6666607776 has 96 divisors (see below), whose sum is σ = 18284797440. Its totient is φ = 2122782464.

The previous prime is 6666607763. The next prime is 6666607819. The reversal of 6666607776 is 6777066666.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2248471 + ... + 2251433.

It is an arithmetic number, because the mean of its divisors is an integer number (190466640).

Almost surely, 2^6666607776 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 6666607776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9142398720).

6666607776 is an abundant number, since it is smaller than the sum of its proper divisors (11618189664).

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

6666607776 is a wasteful number, since it uses less digits than its factorization.

6666607776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4018 (or 4010 counting only the distinct ones).

The product of its (nonzero) digits is 16003008, while the sum is 57.

The square root of 6666607776 is about 81649.2974617663. The cubic root of 6666607776 is about 1882.0665159218.

The spelling of 6666607776 in words is "six billion, six hundred sixty-six million, six hundred seven thousand, seven hundred seventy-six".