667320144 has 40 divisors (see below), whose sum is σ = 1739180352. Its totient is φ = 220469760.

The previous prime is 667320113. The next prime is 667320217. The reversal of 667320144 is 441023766.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 56092 + ... + 66939.

Almost surely, 2^667320144 is an apocalyptic number.

It is an amenable number.

667320144 is an abundant number, since it is smaller than the sum of its proper divisors (1071860208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667320144 is a wasteful number, since it uses less digits than its factorization.

667320144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123155 (or 123149 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 667320144 is about 25832.5404093364. The cubic root of 667320144 is about 873.8658040415.

The spelling of 667320144 in words is "six hundred sixty-seven million, three hundred twenty thousand, one hundred forty-four".