86661390268 has 24 divisors (see below), whose sum is σ = 152221698720. Its totient is φ = 43169617920.

The previous prime is 86661390209. The next prime is 86661390293. The reversal of 86661390268 is 86209316668.

It is a happy number.

It is a super-2 number, since 2×86661390268² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 2612088 + ... + 2645056.

It is an arithmetic number, because the mean of its divisors is an integer number (6342570780).

Almost surely, 2^86661390268 is an apocalyptic number.

It is an amenable number.

86661390268 is a deficient number, since it is larger than the sum of its proper divisors (65560308452).

86661390268 is a wasteful number, since it uses less digits than its factorization.

86661390268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35397 (or 35395 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 86661390268 in words is "eighty-six billion, six hundred sixty-one million, three hundred ninety thousand, two hundred sixty-eight".