662011643326 has 40 divisors (see below), whose sum is σ = 1103132331720. Its totient is φ = 297933702000.

The previous prime is 662011643323. The next prime is 662011643333. The reversal of 662011643326 is 623346110266.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662011643323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2845561 + ... + 3069403.

It is an arithmetic number, because the mean of its divisors is an integer number (27578308293).

Almost surely, 2^662011643326 is an apocalyptic number.

662011643326 is a deficient number, since it is larger than the sum of its proper divisors (441120688394).

662011643326 is a wasteful number, since it uses less digits than its factorization.

662011643326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223990 (or 223957 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 662011643326 in words is "six hundred sixty-two billion, eleven million, six hundred forty-three thousand, three hundred twenty-six".