813662688066 has 64 divisors (see below), whose sum is σ = 1700786626560. Its totient is φ = 259203035520.

The previous prime is 813662688029. The next prime is 813662688077. The reversal of 813662688066 is 660886266318.

It is a happy number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 13594081 + ... + 13653803.

It is an arithmetic number, because the mean of its divisors is an integer number (26574791040).

Almost surely, 2^813662688066 is an apocalyptic number.

813662688066 is an abundant number, since it is smaller than the sum of its proper divisors (887123938494).

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

813662688066 is a wasteful number, since it uses less digits than its factorization.

813662688066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60671.

The product of its (nonzero) digits is 23887872, while the sum is 60.

The spelling of 813662688066 in words is "eight hundred thirteen billion, six hundred sixty-two million, six hundred eighty-eight thousand, sixty-six".