667756652 has 12 divisors (see below), whose sum is σ = 1180144896. Its totient is φ = 330572400.

The previous prime is 667756619. The next prime is 667756667. The reversal of 667756652 is 256657766.

667756652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 667756652.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 826028 + ... + 826835.

It is an arithmetic number, because the mean of its divisors is an integer number (98345408).

Almost surely, 2^667756652 is an apocalyptic number.

It is an amenable number.

667756652 is a deficient number, since it is larger than the sum of its proper divisors (512388244).

667756652 is a wasteful number, since it uses less digits than its factorization.

667756652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652968 (or 1652966 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 50.

The square root of 667756652 is about 25840.9878294155. The cubic root of 667756652 is about 874.0563004505.

The spelling of 667756652 in words is "six hundred sixty-seven million, seven hundred fifty-six thousand, six hundred fifty-two".