2663199878440 has 24 divisors (see below), whose sum is σ = 5992222949370. Its totient is φ = 1065275822880.

The previous prime is 2663199878431. The next prime is 2663199878467. The reversal of 2663199878440 is 448789913662.

It can be written as a sum of positive squares in only one way, i.e., 2396879890596 + 266319987844 = 1548186^2 + 516062^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10192225 + ... + 10450255.

Almost surely, 2^{2663199878440} is an apocalyptic number.

2663199878440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2663199878440 is an abundant number, since it is smaller than the sum of its proper divisors (3329023070930).

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

2663199878440 is an frugal number, since it uses more digits than its factorization.

2663199878440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516073 (or 258038 counting only the distinct ones).

The product of its (nonzero) digits is 125411328, while the sum is 67.

The spelling of 2663199878440 in words is "two trillion, six hundred sixty-three billion, one hundred ninety-nine million, eight hundred seventy-eight thousand, four hundred forty".