7143642866 has 4 divisors (see below), whose sum is σ = 10715464302. Its totient is φ = 3571821432.

The previous prime is 7143642859. The next prime is 7143642881. The reversal of 7143642866 is 6682463417.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6332817241 + 810825625 = 79579^2 + 28475^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7143642866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1785910715 + ... + 1785910718.

Almost surely, 2^7143642866 is an apocalyptic number.

7143642866 is a deficient number, since it is larger than the sum of its proper divisors (3571821436).

7143642866 is a wasteful number, since it uses less digits than its factorization.

7143642866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3571821435.

The product of its digits is 1161216, while the sum is 47.

The square root of 7143642866 is about 84520.0737458268. The cubic root of 7143642866 is about 1925.9273985099.

The spelling of 7143642866 in words is "seven billion, one hundred forty-three million, six hundred forty-two thousand, eight hundred sixty-six".