13665243407 has 16 divisors (see below), whose sum is σ = 14025830400. Its totient is φ = 13310320800.

The previous prime is 13665243367. The next prime is 13665243409. The reversal of 13665243407 is 70434256631.

It is a cyclic number.

It is not a de Polignac number, because 13665243407 - 2¹² = 13665239311 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 (13665243409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2017208 + ... + 2023970.

It is an arithmetic number, because the mean of its divisors is an integer number (876614400).

Almost surely, 2^13665243407 is an apocalyptic number.

13665243407 is a deficient number, since it is larger than the sum of its proper divisors (360586993).

13665243407 is a wasteful number, since it uses less digits than its factorization.

13665243407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7174.

The product of its (nonzero) digits is 362880, while the sum is 41.

The spelling of 13665243407 in words is "thirteen billion, six hundred sixty-five million, two hundred forty-three thousand, four hundred seven".