666413 has 8 divisors (see below), whose sum is σ = 743040. Its totient is φ = 592480.

The previous prime is 666403. The next prime is 666427. The reversal of 666413 is 314666.

666413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 666413 - 2¹⁶ = 600877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 666413.

It is not an unprimeable number, because it can be changed into a prime (666403) 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, 128 + ... + 1161.

It is an arithmetic number, because the mean of its divisors is an integer number (92880).

2⁶⁶⁶⁴¹³ is an apocalyptic number.

It is an amenable number.

666413 is a deficient number, since it is larger than the sum of its proper divisors (76627).

666413 is a wasteful number, since it uses less digits than its factorization.

666413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347.

The product of its digits is 2592, while the sum is 26.

The square root of 666413 is about 816.3412276738. The cubic root of 666413 is about 87.3469651558.

The spelling of 666413 in words is "six hundred sixty-six thousand, four hundred thirteen".