12465907866 has 96 divisors (see below), whose sum is σ = 30614500800. Its totient is φ = 3642140160.

The previous prime is 12465907837. The next prime is 12465907889. The reversal of 12465907866 is 66870956421.

12465907866 is a `hidden beast` number, since 1 + 2 + 46 + 590 + 7 + 8 + 6 + 6 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 324856 + ... + 361196.

It is an arithmetic number, because the mean of its divisors is an integer number (318901050).

Almost surely, 2^12465907866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12465907866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15307250400).

12465907866 is an abundant number, since it is smaller than the sum of its proper divisors (18148592934).

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

12465907866 is a wasteful number, since it uses less digits than its factorization.

12465907866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36444 (or 36441 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 12465907866 in words is "twelve billion, four hundred sixty-five million, nine hundred seven thousand, eight hundred sixty-six".