667845328 has 10 divisors (see below), whose sum is σ = 1293950354. Its totient is φ = 333922656.

The previous prime is 667845287. The next prime is 667845329. The reversal of 667845328 is 823548766.

It can be written as a sum of positive squares in only one way, i.e., 486996624 + 180848704 = 22068^2 + 13448^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667845329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20870151 + ... + 20870182.

Almost surely, 2^667845328 is an apocalyptic number.

It is an amenable number.

667845328 is a deficient number, since it is larger than the sum of its proper divisors (626105026).

667845328 is a wasteful number, since it uses less digits than its factorization.

667845328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41740341 (or 41740335 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 49.

The square root of 667845328 is about 25842.7035737362. The cubic root of 667845328 is about 874.0949893878.

The spelling of 667845328 in words is "six hundred sixty-seven million, eight hundred forty-five thousand, three hundred twenty-eight".