663799862249 has 4 divisors (see below), whose sum is σ = 663807992064. Its totient is φ = 663791732436.

The previous prime is 663799862191. The next prime is 663799862261. The reversal of 663799862249 is 942268997366.

663799862249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 942268997366 = 2 ⋅471134498683.

It is a cyclic number.

It is not a de Polignac number, because 663799862249 - 2¹⁶ = 663799796713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663799862279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3941177 + ... + 4106150.

It is an arithmetic number, because the mean of its divisors is an integer number (165951998016).

Almost surely, 2^663799862249 is an apocalyptic number.

It is an amenable number.

663799862249 is a deficient number, since it is larger than the sum of its proper divisors (8129815).

663799862249 is an equidigital number, since it uses as much as digits as its factorization.

663799862249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8129814.

The product of its digits is 423263232, while the sum is 71.

The spelling of 663799862249 in words is "six hundred sixty-three billion, seven hundred ninety-nine million, eight hundred sixty-two thousand, two hundred forty-nine".