664626354250 has 16 divisors (see below), whose sum is σ = 1244180535624. Its totient is φ = 265850541600.

The previous prime is 664626354247. The next prime is 664626354251. The reversal of 664626354250 is 52453626466.

664626354250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 144362762401 + 520263591849 = 379951^2 + 721293^2 .

It is a junction number, because it is equal to n+sod(n) for n = 664626354194 and 664626354203.

It is not an unprimeable number, because it can be changed into a prime (664626354251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1329252459 + ... + 1329252958.

Almost surely, 2^664626354250 is an apocalyptic number.

664626354250 is a deficient number, since it is larger than the sum of its proper divisors (579554181374).

664626354250 is a wasteful number, since it uses less digits than its factorization.

664626354250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2658505434 (or 2658505424 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 49.

The spelling of 664626354250 in words is "six hundred sixty-four billion, six hundred twenty-six million, three hundred fifty-four thousand, two hundred fifty".