666113 has 8 divisors (see below), whose sum is σ = 779328. Its totient is φ = 557424.

The previous prime is 666109. The next prime is 666119. The reversal of 666113 is 311666.

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

It is not a de Polignac number, because 666113 - 2² = 666109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666119) 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, 806 + ... + 1407.

It is an arithmetic number, because the mean of its divisors is an integer number (97416).

2⁶⁶⁶¹¹³ is an apocalyptic number.

It is an amenable number.

666113 is a deficient number, since it is larger than the sum of its proper divisors (113215).

666113 is a wasteful number, since it uses less digits than its factorization.

666113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2263.

The product of its digits is 648, while the sum is 23.

The square root of 666113 is about 816.1574602980. The cubic root of 666113 is about 87.3338561565. Note that the first 3 decimals are identical.

Adding to 666113 its reverse (311666), we get a palindrome (977779).

The spelling of 666113 in words is "six hundred sixty-six thousand, one hundred thirteen".