166503211633304 has 32 divisors (see below), whose sum is σ = 384238180693920. Its totient is φ = 65869402404096.

The previous prime is 166503211633303. The next prime is 166503211633361. The reversal of 166503211633304 is 403336112305661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166503211633303) 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, 114356600669 + ... + 114356602124.

It is an arithmetic number, because the mean of its divisors is an integer number (12007443146685).

Almost surely, 2^{166503211633304} is an apocalyptic number.

166503211633304 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

166503211633304 is an abundant number, since it is smaller than the sum of its proper divisors (217734969060616).

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

166503211633304 is a wasteful number, since it uses less digits than its factorization.

166503211633304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228713202819 (or 228713202815 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 44.

Adding to 166503211633304 its reverse (403336112305661), we get a palindrome (569839323938965).

The spelling of 166503211633304 in words is "one hundred sixty-six trillion, five hundred three billion, two hundred eleven million, six hundred thirty-three thousand, three hundred four".