12895066866 has 32 divisors (see below), whose sum is σ = 28820909376. Its totient is φ = 3812288000.

The previous prime is 12895066861. The next prime is 12895066901. The reversal of 12895066866 is 66866059821.

It is a happy number.

It is a super-2 number, since 2×12895066866² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12895066861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2379975 + ... + 2385386.

It is an arithmetic number, because the mean of its divisors is an integer number (900653418).

Almost surely, 2^12895066866 is an apocalyptic number.

12895066866 is an abundant number, since it is smaller than the sum of its proper divisors (15925842510).

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

12895066866 is a wasteful number, since it uses less digits than its factorization.

12895066866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4765418.

The product of its (nonzero) digits is 7464960, while the sum is 57.

The spelling of 12895066866 in words is "twelve billion, eight hundred ninety-five million, sixty-six thousand, eight hundred sixty-six".