668063952 has 60 divisors (see below), whose sum is σ = 1934134020. Its totient is φ = 215007744.

The previous prime is 668063933. The next prime is 668064013. The reversal of 668063952 is 259360866.

It is a happy number.

668063952 is a `hidden beast` number, since 6 + 6 + 8 + 0 + 639 + 5 + 2 = 666.

668063952 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 127780416 + 540283536 = 11304^2 + 23244^2 .

It is a junction number, because it is equal to n+sod(n) for n = 668063898 and 668063907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75813 + ... + 84164.

It is an arithmetic number, because the mean of its divisors is an integer number (32235567).

Almost surely, 2^668063952 is an apocalyptic number.

It is an amenable number.

668063952 is an abundant number, since it is smaller than the sum of its proper divisors (1266070068).

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

668063952 is a wasteful number, since it uses less digits than its factorization.

668063952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160020 (or 160011 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 668063952 is about 25846.9331256147. The cubic root of 668063952 is about 874.1903594215.

The spelling of 668063952 in words is "six hundred sixty-eight million, sixty-three thousand, nine hundred fifty-two".