6665766612 has 12 divisors (see below), whose sum is σ = 15553455456. Its totient is φ = 2221922200.

The previous prime is 6665766607. The next prime is 6665766619. The reversal of 6665766612 is 2166675666.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665766619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277740264 + ... + 277740287.

It is an arithmetic number, because the mean of its divisors is an integer number (1296121288).

Almost surely, 2^6665766612 is an apocalyptic number.

It is an amenable number.

6665766612 is an abundant number, since it is smaller than the sum of its proper divisors (8887688844).

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

6665766612 is a wasteful number, since it uses less digits than its factorization.

6665766612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555480558 (or 555480556 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 51.

The square root of 6665766612 is about 81644.1462200445. The cubic root of 6665766612 is about 1881.9873555632.

The spelling of 6665766612 in words is "six billion, six hundred sixty-five million, seven hundred sixty-six thousand, six hundred twelve".