6662679245781 has 48 divisors (see below), whose sum is σ = 9711760352832. Its totient is φ = 4060835251200.

The previous prime is 6662679245779. The next prime is 6662679245863. The reversal of 6662679245781 is 1875429762666.

It is not a de Polignac number, because 6662679245781 - 2¹ = 6662679245779 is a prime.

It is a super-3 number, since 3×6662679245781³ (a number of 39 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6662679245081) 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, 79076766 + ... + 79160976.

It is an arithmetic number, because the mean of its divisors is an integer number (202328340684).

Almost surely, 2^{6662679245781} is an apocalyptic number.

It is an amenable number.

6662679245781 is a deficient number, since it is larger than the sum of its proper divisors (3049081107051).

6662679245781 is a wasteful number, since it uses less digits than its factorization.

6662679245781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85734 (or 85721 counting only the distinct ones).

The product of its digits is 365783040, while the sum is 69.

The spelling of 6662679245781 in words is "six trillion, six hundred sixty-two billion, six hundred seventy-nine million, two hundred forty-five thousand, seven hundred eighty-one".