667244789 has 8 divisors (see below), whose sum is σ = 720264960. Its totient is φ = 616225456.

The previous prime is 667244777. The next prime is 667244827. The reversal of 667244789 is 987442766.

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 667244789 - 2⁸ = 667244533 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 667244789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667244729) 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 7 ways as a sum of consecutive naturals, for example, 499517 + ... + 500850.

It is an arithmetic number, because the mean of its divisors is an integer number (90033120).

Almost surely, 2^667244789 is an apocalyptic number.

It is an amenable number.

667244789 is a deficient number, since it is larger than the sum of its proper divisors (53020171).

667244789 is a wasteful number, since it uses less digits than its factorization.

667244789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000419.

The product of its digits is 4064256, while the sum is 53.

The square root of 667244789 is about 25831.0818395204. The cubic root of 667244789 is about 873.8329099666.

The spelling of 667244789 in words is "six hundred sixty-seven million, two hundred forty-four thousand, seven hundred eighty-nine".