666382755842 has 8 divisors (see below), whose sum is σ = 1003131337932. Its totient is φ = 332005643200.

The previous prime is 666382755823. The next prime is 666382755917. The reversal of 666382755842 is 248557283666.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 567504582241 + 98878173601 = 753329^2 + 314449^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592866659 + ... + 592867782.

Almost surely, 2^666382755842 is an apocalyptic number.

666382755842 is a deficient number, since it is larger than the sum of its proper divisors (336748582090).

666382755842 is a wasteful number, since it uses less digits than its factorization.

666382755842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185734724.

The product of its digits is 116121600, while the sum is 62.

The spelling of 666382755842 in words is "six hundred sixty-six billion, three hundred eighty-two million, seven hundred fifty-five thousand, eight hundred forty-two".