640201166330 has 24 divisors (see below), whose sum is σ = 1266645946356. Its totient is φ = 232800423680.

The previous prime is 640201166221. The next prime is 640201166333. The reversal of 640201166330 is 33661102046.

It can be written as a sum of positive squares in 2 ways, for example, as 633569832841 + 6631333489 = 795971^2 + 81433^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (640201166333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 264544727 + ... + 264547146.

Almost surely, 2^640201166330 is an apocalyptic number.

640201166330 is a deficient number, since it is larger than the sum of its proper divisors (626444780026).

640201166330 is a wasteful number, since it uses less digits than its factorization.

640201166330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529091902 (or 529091891 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

Adding to 640201166330 its reverse (33661102046), we get a palindrome (673862268376).

The spelling of 640201166330 in words is "six hundred forty billion, two hundred one million, one hundred sixty-six thousand, three hundred thirty".