2663398317620 has 24 divisors (see below), whose sum is σ = 5593172963784. Its totient is φ = 1065352375296.

The previous prime is 2663398317583. The next prime is 2663398317649. The reversal of 2663398317620 is 267138933662.

It is a happy number.

2663398317620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 157623292324 + 2505775025296 = 397018^2 + 1582964^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3638312 + ... + 4308608.

It is an arithmetic number, because the mean of its divisors is an integer number (233048873491).

Almost surely, 2^{2663398317620} is an apocalyptic number.

2663398317620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2663398317620 is an abundant number, since it is smaller than the sum of its proper divisors (2929774646164).

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

2663398317620 is a wasteful number, since it uses less digits than its factorization.

2663398317620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868979 (or 868977 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 56.

The spelling of 2663398317620 in words is "two trillion, six hundred sixty-three billion, three hundred ninety-eight million, three hundred seventeen thousand, six hundred twenty".