13061990663 has 4 divisors (see below), whose sum is σ = 13062257328. Its totient is φ = 13061724000.

The previous prime is 13061990657. The next prime is 13061990687. The reversal of 13061990663 is 36609916031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36609916031 = 13 ⋅2816147387.

It is a cyclic number.

It is not a de Polignac number, because 13061990663 - 2⁸ = 13061990407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13061990633) 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, 36338 + ... + 165663.

It is an arithmetic number, because the mean of its divisors is an integer number (3265564332).

Almost surely, 2^13061990663 is an apocalyptic number.

13061990663 is a deficient number, since it is larger than the sum of its proper divisors (266665).

13061990663 is an equidigital number, since it uses as much as digits as its factorization.

13061990663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266664.

The product of its (nonzero) digits is 157464, while the sum is 44.

The spelling of 13061990663 in words is "thirteen billion, sixty-one million, nine hundred ninety thousand, six hundred sixty-three".