6408867866 has 4 divisors (see below), whose sum is σ = 9613301802. Its totient is φ = 3204433932.

The previous prime is 6408867841. The next prime is 6408867901. The reversal of 6408867866 is 6687688046.

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., 3991080625 + 2417787241 = 63175^2 + 49171^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1602216965 + ... + 1602216968.

Almost surely, 2^6408867866 is an apocalyptic number.

6408867866 is a deficient number, since it is larger than the sum of its proper divisors (3204433936).

6408867866 is a wasteful number, since it uses less digits than its factorization.

6408867866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3204433935.

The product of its (nonzero) digits is 18579456, while the sum is 59.

The square root of 6408867866 is about 80055.4049768034. The cubic root of 6408867866 is about 1857.4926582676.

The spelling of 6408867866 in words is "six billion, four hundred eight million, eight hundred sixty-seven thousand, eight hundred sixty-six".