664202644206 has 16 divisors (see below), whose sum is σ = 1328663142864. Its totient is φ = 221357905664.

The previous prime is 664202644201. The next prime is 664202644223. The reversal of 664202644206 is 602446202466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664202644201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10710441 + ... + 10772276.

It is an arithmetic number, because the mean of its divisors is an integer number (83041446429).

Almost surely, 2^664202644206 is an apocalyptic number.

664202644206 is an abundant number, since it is smaller than the sum of its proper divisors (664460498658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664202644206 is a wasteful number, since it uses less digits than its factorization.

664202644206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21487875.

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 664202644206 in words is "six hundred sixty-four billion, two hundred two million, six hundred forty-four thousand, two hundred six".