666379 has 8 divisors (see below), whose sum is σ = 794880. Its totient is φ = 546216.

The previous prime is 666353. The next prime is 666403. The reversal of 666379 is 973666.

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 666379 - 2¹¹ = 664331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666329) 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, 1909 + ... + 2230.

It is an arithmetic number, because the mean of its divisors is an integer number (99360).

2⁶⁶⁶³⁷⁹ is an apocalyptic number.

666379 is a deficient number, since it is larger than the sum of its proper divisors (128501).

666379 is a wasteful number, since it uses less digits than its factorization.

666379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4169.

The product of its digits is 40824, while the sum is 37.

The square root of 666379 is about 816.3204027831. The cubic root of 666379 is about 87.3454796669.

The spelling of 666379 in words is "six hundred sixty-six thousand, three hundred seventy-nine".