86664646668 has 96 divisors (see below), whose sum is σ = 219140328960. Its totient is φ = 26574929920.

The previous prime is 86664646643. The next prime is 86664646721.

86664646668 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 86664646599 and 86664646608.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2035963 + ... + 2078093.

It is an arithmetic number, because the mean of its divisors is an integer number (2282711760).

Almost surely, 2^86664646668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86664646668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109570164480).

86664646668 is an abundant number, since it is smaller than the sum of its proper divisors (132475682292).

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

86664646668 is a wasteful number, since it uses less digits than its factorization.

86664646668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42447 (or 42445 counting only the distinct ones).

The product of its digits is 286654464, while the sum is 66.

The spelling of 86664646668 in words is "eighty-six billion, six hundred sixty-four million, six hundred forty-six thousand, six hundred sixty-eight".