6419866 has 4 divisors (see below), whose sum is σ = 9629802. Its totient is φ = 3209932.

The previous prime is 6419851. The next prime is 6419879. The reversal of 6419866 is 6689146.

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., 6395841 + 24025 = 2529^2 + 155^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1604965 + ... + 1604968.

Almost surely, 2^6419866 is an apocalyptic number.

6419866 is a deficient number, since it is larger than the sum of its proper divisors (3209936).

6419866 is a wasteful number, since it uses less digits than its factorization.

6419866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3209935.

The product of its digits is 62208, while the sum is 40.

The square root of 6419866 is about 2533.7454489352. The cubic root of 6419866 is about 185.8554586771.

The spelling of 6419866 in words is "six million, four hundred nineteen thousand, eight hundred sixty-six".