668304012 has 12 divisors (see below), whose sum is σ = 1559376056. Its totient is φ = 222768000.

The previous prime is 668304011. The next prime is 668304019. The reversal of 668304012 is 210403866.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×668304012² = 893260504910592288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (668304011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27845989 + ... + 27846012.

Almost surely, 2^668304012 is an apocalyptic number.

It is an amenable number.

668304012 is an abundant number, since it is smaller than the sum of its proper divisors (891072044).

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

668304012 is a wasteful number, since it uses less digits than its factorization.

668304012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55692008 (or 55692006 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 668304012 is about 25851.5765863516. The cubic root of 668304012 is about 874.2950564871.

Adding to 668304012 its reverse (210403866), we get a palindrome (878707878).

The spelling of 668304012 in words is "six hundred sixty-eight million, three hundred four thousand, twelve".