666673339 has 4 divisors (see below), whose sum is σ = 670919824. Its totient is φ = 662426856.

The previous prime is 666673297. The next prime is 666673361. The reversal of 666673339 is 933376666.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 666673339 - 2⁷ = 666673211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666673292 and 666673301.

It is not an unprimeable number, because it can be changed into a prime (666673369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2123007 + ... + 2123320.

It is an arithmetic number, because the mean of its divisors is an integer number (167729956).

Almost surely, 2^666673339 is an apocalyptic number.

666673339 is a deficient number, since it is larger than the sum of its proper divisors (4246485).

666673339 is a wasteful number, since it uses less digits than its factorization.

666673339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4246484.

The product of its digits is 2204496, while the sum is 49.

The square root of 666673339 is about 25820.0181835722. The cubic root of 666673339 is about 873.5833791366.

The spelling of 666673339 in words is "six hundred sixty-six million, six hundred seventy-three thousand, three hundred thirty-nine".