667340768 has 24 divisors (see below), whose sum is σ = 1370951568. Its totient is φ = 319162624.

The previous prime is 667340767. The next prime is 667340771. The reversal of 667340768 is 867043766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667340767) 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 3 ways as a sum of consecutive naturals, for example, 452621 + ... + 454092.

It is an arithmetic number, because the mean of its divisors is an integer number (57122982).

Almost surely, 2^667340768 is an apocalyptic number.

It is an amenable number.

667340768 is an abundant number, since it is smaller than the sum of its proper divisors (703610800).

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

667340768 is a wasteful number, since it uses less digits than its factorization.

667340768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906746 (or 906738 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 47.

The square root of 667340768 is about 25832.9395926983. The cubic root of 667340768 is about 873.8748064285.

The spelling of 667340768 in words is "six hundred sixty-seven million, three hundred forty thousand, seven hundred sixty-eight".