664200626 has 4 divisors (see below), whose sum is σ = 996300942. Its totient is φ = 332100312.

The previous prime is 664200623. The next prime is 664200631. The reversal of 664200626 is 626002466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 614990401 + 49210225 = 24799^2 + 7015^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 664200592 and 664200601.

It is not an unprimeable number, because it can be changed into a prime (664200623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166050155 + ... + 166050158.

Almost surely, 2^664200626 is an apocalyptic number.

664200626 is a deficient number, since it is larger than the sum of its proper divisors (332100316).

664200626 is a wasteful number, since it uses less digits than its factorization.

664200626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332100315.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 664200626 is about 25772.0900588214. The cubic root of 664200626 is about 872.5019913858.

The spelling of 664200626 in words is "six hundred sixty-four million, two hundred thousand, six hundred twenty-six".