66394148886 has 24 divisors (see below), whose sum is σ = 154919681280. Its totient is φ = 20428968816.

The previous prime is 66394148879. The next prime is 66394148903. The reversal of 66394148886 is 68884149366.

66394148886 is a `hidden beast` number, since 6 + 6 + 39 + 41 + 488 + 86 = 666.

66394148886 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141867606 + ... + 141868073.

It is an arithmetic number, because the mean of its divisors is an integer number (6454986720).

Almost surely, 2^66394148886 is an apocalyptic number.

66394148886 is an abundant number, since it is smaller than the sum of its proper divisors (88525532394).

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

66394148886 is a wasteful number, since it uses less digits than its factorization.

66394148886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283735700 (or 283735697 counting only the distinct ones).

The product of its digits is 47775744, while the sum is 63.

The spelling of 66394148886 in words is "sixty-six billion, three hundred ninety-four million, one hundred forty-eight thousand, eight hundred eighty-six".