664850900402 has 16 divisors (see below), whose sum is σ = 1074424306200. Its totient is φ = 306730150272.

The previous prime is 664850900353. The next prime is 664850900437. The reversal of 664850900402 is 204009058466.

664850900402 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 553222076521 + 111628823881 = 743789^2 + 334109^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5105777 + ... + 5234372.

Almost surely, 2^664850900402 is an apocalyptic number.

664850900402 is a deficient number, since it is larger than the sum of its proper divisors (409573405798).

664850900402 is a wasteful number, since it uses less digits than its factorization.

664850900402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10342637.

The product of its (nonzero) digits is 414720, while the sum is 44.

Adding to 664850900402 its reverse (204009058466), we get a palindrome (868859958868).

The spelling of 664850900402 in words is "six hundred sixty-four billion, eight hundred fifty million, nine hundred thousand, four hundred two".