64668643026 has 16 divisors (see below), whose sum is σ = 139286308224. Its totient is φ = 19898043984.

The previous prime is 64668642901. The next prime is 64668643051. The reversal of 64668643026 is 62034686646.

It is a self number, because there is not a number n which added to its sum of digits gives 64668643026.

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 7 ways as a sum of consecutive naturals, for example, 414542506 + ... + 414542661.

It is an arithmetic number, because the mean of its divisors is an integer number (8705394264).

Almost surely, 2^64668643026 is an apocalyptic number.

64668643026 is an abundant number, since it is smaller than the sum of its proper divisors (74617665198).

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

64668643026 is a wasteful number, since it uses less digits than its factorization.

64668643026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829085185.

The product of its (nonzero) digits is 5971968, while the sum is 51.

The spelling of 64668643026 in words is "sixty-four billion, six hundred sixty-eight million, six hundred forty-three thousand, twenty-six".