6666757842 has 64 divisors (see below), whose sum is σ = 14272070400. Its totient is φ = 2068801536.

The previous prime is 6666757819. The next prime is 6666757843. The reversal of 6666757842 is 2487576666.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (6666757843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4876243 + ... + 4877609.

It is an arithmetic number, because the mean of its divisors is an integer number (223001100).

Almost surely, 2^6666757842 is an apocalyptic number.

6666757842 is an abundant number, since it is smaller than the sum of its proper divisors (7605312558).

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

6666757842 is a wasteful number, since it uses less digits than its factorization.

6666757842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875.

The product of its digits is 20321280, while the sum is 57.

The square root of 6666757842 is about 81650.2164234731. The cubic root of 6666757842 is about 1882.0806376503.

The spelling of 6666757842 in words is "six billion, six hundred sixty-six million, seven hundred fifty-seven thousand, eight hundred forty-two".