662844639959 has 4 divisors (see below), whose sum is σ = 663263368416. Its totient is φ = 662425911504.

The previous prime is 662844639931. The next prime is 662844639983. The reversal of 662844639959 is 959936448266.

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

It is a cyclic number.

It is not a de Polignac number, because 662844639959 - 2¹² = 662844635863 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 662844639892 and 662844639901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662844639559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209361854 + ... + 209365019.

It is an arithmetic number, because the mean of its divisors is an integer number (165815842104).

Almost surely, 2^662844639959 is an apocalyptic number.

662844639959 is a deficient number, since it is larger than the sum of its proper divisors (418728457).

662844639959 is a wasteful number, since it uses less digits than its factorization.

662844639959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418728456.

The product of its digits is 604661760, while the sum is 71.

The spelling of 662844639959 in words is "six hundred sixty-two billion, eight hundred forty-four million, six hundred thirty-nine thousand, nine hundred fifty-nine".