6286868866 has 4 divisors (see below), whose sum is σ = 9430303302. Its totient is φ = 3143434432.

The previous prime is 6286868839. The next prime is 6286868867. The reversal of 6286868866 is 6688686826.

It is a happy number.

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., 5819401225 + 467467641 = 76285^2 + 21621^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6286868798 and 6286868807.

It is not an unprimeable number, because it can be changed into a prime (6286868867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1571717215 + ... + 1571717218.

Almost surely, 2^6286868866 is an apocalyptic number.

6286868866 is a deficient number, since it is larger than the sum of its proper divisors (3143434436).

6286868866 is a wasteful number, since it uses less digits than its factorization.

6286868866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143434435.

The product of its digits is 63700992, while the sum is 64.

The square root of 6286868866 is about 79289.7778153023. Note that the first 3 decimals coincide. The cubic root of 6286868866 is about 1845.6306787965.

The spelling of 6286868866 in words is "six billion, two hundred eighty-six million, eight hundred sixty-eight thousand, eight hundred sixty-six".