660013423 has 8 divisors (see below), whose sum is σ = 702702000. Its totient is φ = 617754240.

The previous prime is 660013411. The next prime is 660013439. The reversal of 660013423 is 324310066.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660013423 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 (660013483) 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, 104173 + ... + 110326.

It is an arithmetic number, because the mean of its divisors is an integer number (87837750).

Almost surely, 2^660013423 is an apocalyptic number.

660013423 is a deficient number, since it is larger than the sum of its proper divisors (42688577).

660013423 is a wasteful number, since it uses less digits than its factorization.

660013423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214697.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 660013423 is about 25690.7264007852. The cubic root of 660013423 is about 870.6646715282.

Adding to 660013423 its reverse (324310066), we get a palindrome (984323489).

The spelling of 660013423 in words is "six hundred sixty million, thirteen thousand, four hundred twenty-three".