13042066665 has 8 divisors (see below), whose sum is σ = 20867306688. Its totient is φ = 6955768880.

The previous prime is 13042066651. The next prime is 13042066669. The reversal of 13042066665 is 56666024031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13042066665 - 2⁹ = 13042066153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13042066669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434735541 + ... + 434735570.

It is an arithmetic number, because the mean of its divisors is an integer number (2608413336).

Almost surely, 2^13042066665 is an apocalyptic number.

13042066665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13042066665 is a deficient number, since it is larger than the sum of its proper divisors (7825240023).

13042066665 is an equidigital number, since it uses as much as digits as its factorization.

13042066665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869471119.

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 13042066665 in words is "thirteen billion, forty-two million, sixty-six thousand, six hundred sixty-five".