2478133866 has 48 divisors (see below), whose sum is σ = 5394254400. Its totient is φ = 758609280.

The previous prime is 2478133859. The next prime is 2478133907. The reversal of 2478133866 is 6683318742.

2478133866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2478133866² = 12282294915632211912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 195646 + ... + 207926.

It is an arithmetic number, because the mean of its divisors is an integer number (112380300).

Almost surely, 2^2478133866 is an apocalyptic number.

2478133866 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2478133866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2697127200).

2478133866 is an abundant number, since it is smaller than the sum of its proper divisors (2916120534).

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

2478133866 is a wasteful number, since it uses less digits than its factorization.

2478133866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12511 (or 12498 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 48.

The square root of 2478133866 is about 49780.8584297218. The cubic root of 2478133866 is about 1353.2402942798.

The spelling of 2478133866 in words is "two billion, four hundred seventy-eight million, one hundred thirty-three thousand, eight hundred sixty-six".