667833389 has 8 divisors (see below), whose sum is σ = 709382520. Its totient is φ = 626535936.

The previous prime is 667833377. The next prime is 667833391. The reversal of 667833389 is 983338766.

It can be written as a sum of positive squares in 4 ways, for example, as 151044100 + 516789289 = 12290^2 + 22733^2 .

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 667833389 - 2¹⁶ = 667767853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 667833389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667833329) 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, 57434 + ... + 68075.

It is an arithmetic number, because the mean of its divisors is an integer number (88672815).

Almost surely, 2^667833389 is an apocalyptic number.

It is an amenable number.

667833389 is a deficient number, since it is larger than the sum of its proper divisors (41549131).

667833389 is a wasteful number, since it uses less digits than its factorization.

667833389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125839.

The product of its digits is 3919104, while the sum is 53.

The square root of 667833389 is about 25842.4725790703. The cubic root of 667833389 is about 874.0897806557.

The spelling of 667833389 in words is "six hundred sixty-seven million, eight hundred thirty-three thousand, three hundred eighty-nine".