503163666 has 48 divisors (see below), whose sum is σ = 1155817728. Its totient is φ = 157917600.

The previous prime is 503163653. The next prime is 503163673. The reversal of 503163666 is 666361305.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 503163666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8461 + ... + 32831.

It is an arithmetic number, because the mean of its divisors is an integer number (24079536).

Almost surely, 2^503163666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 503163666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (577908864).

503163666 is an abundant number, since it is smaller than the sum of its proper divisors (652654062).

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

503163666 is a wasteful number, since it uses less digits than its factorization.

503163666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24447 (or 24444 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 503163666 is about 22431.3099483735. The cubic root of 503163666 is about 795.3710099324.

The spelling of 503163666 in words is "five hundred three million, one hundred sixty-three thousand, six hundred sixty-six".