664614288636 has 24 divisors (see below), whose sum is σ = 1551023464704. Its totient is φ = 221501411760.

The previous prime is 664614288629. The next prime is 664614288649. The reversal of 664614288636 is 636882416466.

It is a self number, because there is not a number n which added to its sum of digits gives 664614288636.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4510020 + ... + 4655051.

It is an arithmetic number, because the mean of its divisors is an integer number (64625977696).

Almost surely, 2^664614288636 is an apocalyptic number.

It is an amenable number.

664614288636 is an abundant number, since it is smaller than the sum of its proper divisors (886409176068).

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

664614288636 is a wasteful number, since it uses less digits than its factorization.

664614288636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9171121 (or 9171119 counting only the distinct ones).

The product of its digits is 47775744, while the sum is 60.

The spelling of 664614288636 in words is "six hundred sixty-four billion, six hundred fourteen million, two hundred eighty-eight thousand, six hundred thirty-six".