203450645066 has 16 divisors (see below), whose sum is σ = 305387901000. Its totient is φ = 101654707968.

The previous prime is 203450645039. The next prime is 203450645141. The reversal of 203450645066 is 660546054302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 203450613025 + 32041 = 451055^2 + 179^2 .

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, 31920656 + ... + 31927028.

Almost surely, 2^203450645066 is an apocalyptic number.

203450645066 is a deficient number, since it is larger than the sum of its proper divisors (101937255934).

203450645066 is a wasteful number, since it uses less digits than its factorization.

203450645066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14953.

The product of its (nonzero) digits is 518400, while the sum is 41.

Adding to 203450645066 its reverse (660546054302), we get a palindrome (863996699368).

The spelling of 203450645066 in words is "two hundred three billion, four hundred fifty million, six hundred forty-five thousand, sixty-six".