667840488 has 64 divisors (see below), whose sum is σ = 1910386560. Its totient is φ = 190584576.

The previous prime is 667840487. The next prime is 667840501. The reversal of 667840488 is 884048766.

It is a self number, because there is not a number n which added to its sum of digits gives 667840488.

It is not an unprimeable number, because it can be changed into a prime (667840487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181806 + ... + 185442.

It is an arithmetic number, because the mean of its divisors is an integer number (29849790).

Almost surely, 2^667840488 is an apocalyptic number.

It is an amenable number.

667840488 is an abundant number, since it is smaller than the sum of its proper divisors (1242546072).

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

667840488 is a wasteful number, since it uses less digits than its factorization.

667840488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4746 (or 4742 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 51.

The square root of 667840488 is about 25842.6099301135. The cubic root of 667840488 is about 874.0928778061.

The spelling of 667840488 in words is "six hundred sixty-seven million, eight hundred forty thousand, four hundred eighty-eight".