664225012 has 12 divisors (see below), whose sum is σ = 1268066016. Its totient is φ = 301920440.

The previous prime is 664224997. The next prime is 664225039. The reversal of 664225012 is 210522466.

It is a super-3 number, since 3×664225012³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

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, 7547968 + ... + 7548055.

It is an arithmetic number, because the mean of its divisors is an integer number (105672168).

Almost surely, 2^664225012 is an apocalyptic number.

It is an amenable number.

664225012 is a deficient number, since it is larger than the sum of its proper divisors (603841004).

664225012 is a wasteful number, since it uses less digits than its factorization.

664225012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15096038 (or 15096036 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 664225012 is about 25772.5631631780. The cubic root of 664225012 is about 872.5126691701.

Adding to 664225012 its reverse (210522466), we get a palindrome (874747478).

The spelling of 664225012 in words is "six hundred sixty-four million, two hundred twenty-five thousand, twelve".