13949666487 has 12 divisors (see below), whose sum is σ = 21210019480. Its totient is φ = 8810315568.

The previous prime is 13949666431. The next prime is 13949666531. The reversal of 13949666487 is 78466694931.

It is not a de Polignac number, because 13949666487 - 2²⁰ = 13948617911 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 (13949676487) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40788328 + ... + 40788669.

Almost surely, 2^13949666487 is an apocalyptic number.

13949666487 is a deficient number, since it is larger than the sum of its proper divisors (7260352993).

13949666487 is a wasteful number, since it uses less digits than its factorization.

13949666487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81577022 (or 81577019 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 63.

The spelling of 13949666487 in words is "thirteen billion, nine hundred forty-nine million, six hundred sixty-six thousand, four hundred eighty-seven".