2478671446866 has 32 divisors (see below), whose sum is σ = 4986446756928. Its totient is φ = 821376313920.

The previous prime is 2478671446847. The next prime is 2478671446897. The reversal of 2478671446866 is 6686441768742.

It is a super-2 number, since 2×2478671446866² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2478671446866.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2776641 + ... + 3559083.

It is an arithmetic number, because the mean of its divisors is an integer number (155826461154).

Almost surely, 2^{2478671446866} is an apocalyptic number.

2478671446866 is an abundant number, since it is smaller than the sum of its proper divisors (2507775310062).

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

2478671446866 is a wasteful number, since it uses less digits than its factorization.

2478671446866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785546.

The product of its digits is 520224768, while the sum is 69.

The spelling of 2478671446866 in words is "two trillion, four hundred seventy-eight billion, six hundred seventy-one million, four hundred forty-six thousand, eight hundred sixty-six".