668258276 has 18 divisors (see below), whose sum is σ = 1360383318. Its totient is φ = 286396320.

The previous prime is 668258273. The next prime is 668258293. The reversal of 668258276 is 672852866.

It can be written as a sum of positive squares in only one way, i.e., 621006400 + 47251876 = 24920^2 + 6874^2 .

It is not an unprimeable number, because it can be changed into a prime (668258273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1704545 + ... + 1704936.

It is an arithmetic number, because the mean of its divisors is an integer number (75576851).

Almost surely, 2^668258276 is an apocalyptic number.

It is an amenable number.

668258276 is an abundant number, since it is smaller than the sum of its proper divisors (692125042).

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

668258276 is a wasteful number, since it uses less digits than its factorization.

668258276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3409499 (or 3409490 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 50.

The square root of 668258276 is about 25850.6919830012. The cubic root of 668258276 is about 874.2751116365.

The spelling of 668258276 in words is "six hundred sixty-eight million, two hundred fifty-eight thousand, two hundred seventy-six".