202640664 has 16 divisors (see below), whose sum is σ = 506601720. Its totient is φ = 67546880.

The previous prime is 202640657. The next prime is 202640687. The reversal of 202640664 is 466046202.

202640664 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4221657 + ... + 4221704.

Almost surely, 2^202640664 is an apocalyptic number.

202640664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

202640664 is an abundant number, since it is smaller than the sum of its proper divisors (303961056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202640664 is a wasteful number, since it uses less digits than its factorization.

202640664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8443370 (or 8443366 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 202640664 is about 14235.1910419214. The cubic root of 202640664 is about 587.3660853070.

Adding to 202640664 its reverse (466046202), we get a palindrome (668686866).

The spelling of 202640664 in words is "two hundred two million, six hundred forty thousand, six hundred sixty-four".