668448735 has 16 divisors (see below), whose sum is σ = 1073175264. Its totient is φ = 355286912.

The previous prime is 668448727. The next prime is 668448779. The reversal of 668448735 is 537844866.

It is a cyclic number.

It is not a de Polignac number, because 668448735 - 2³ = 668448727 is a prime.

It is a super-2 number, since 2×668448735² = 893647422646200450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71652 + ... + 80441.

It is an arithmetic number, because the mean of its divisors is an integer number (67073454).

Almost surely, 2^668448735 is an apocalyptic number.

668448735 is a deficient number, since it is larger than the sum of its proper divisors (404726529).

668448735 is a wasteful number, since it uses less digits than its factorization.

668448735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152394.

The product of its digits is 3870720, while the sum is 51.

The square root of 668448735 is about 25854.3755484444. The cubic root of 668448735 is about 874.3581622338.

The spelling of 668448735 in words is "six hundred sixty-eight million, four hundred forty-eight thousand, seven hundred thirty-five".