664363736318 has 4 divisors (see below), whose sum is σ = 996545604480. Its totient is φ = 332181868158.

The previous prime is 664363736317. The next prime is 664363736327. The reversal of 664363736318 is 813637363466.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664363736317) by changing a digit.

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 as a sum of consecutive naturals, namely, 166090934078 + ... + 166090934081.

It is an arithmetic number, because the mean of its divisors is an integer number (249136401120).

Almost surely, 2^664363736318 is an apocalyptic number.

664363736318 is a deficient number, since it is larger than the sum of its proper divisors (332181868162).

664363736318 is a wasteful number, since it uses less digits than its factorization.

664363736318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332181868161.

The product of its digits is 23514624, while the sum is 56.

The spelling of 664363736318 in words is "six hundred sixty-four billion, three hundred sixty-three million, seven hundred thirty-six thousand, three hundred eighteen".