664025002 has 8 divisors (see below), whose sum is σ = 996639300. Its totient is φ = 331811904.

The previous prime is 664024957. The next prime is 664025017. The reversal of 664025002 is 200520466.

It can be written as a sum of positive squares in 2 ways, for example, as 624950001 + 39075001 = 24999^2 + 6251^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×664025002² = 881858406562200008, which contains 22 as substring.

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, 96127 + ... + 102802.

Almost surely, 2^664025002 is an apocalyptic number.

664025002 is a deficient number, since it is larger than the sum of its proper divisors (332614298).

664025002 is a wasteful number, since it uses less digits than its factorization.

664025002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200600.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 664025002 is about 25768.6825817697. The cubic root of 664025002 is about 872.4250840020.

Adding to 664025002 its reverse (200520466), we get a palindrome (864545468).

The spelling of 664025002 in words is "six hundred sixty-four million, twenty-five thousand, two".