506665650 has 48 divisors (see below), whose sum is σ = 1260687168. Its totient is φ = 134664000.

The previous prime is 506665561. The next prime is 506665673. The reversal of 506665650 is 56566605.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 506665599 and 506665608.

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, 41220 + ... + 52080.

It is an arithmetic number, because the mean of its divisors is an integer number (26264316).

Almost surely, 2^506665650 is an apocalyptic number.

506665650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 506665650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (630343584).

506665650 is an abundant number, since it is smaller than the sum of its proper divisors (754021518).

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

506665650 is a wasteful number, since it uses less digits than its factorization.

506665650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11187 (or 11182 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 39.

The square root of 506665650 is about 22509.2347715332. The cubic root of 506665650 is about 797.2119877299.

The spelling of 506665650 in words is "five hundred six million, six hundred sixty-five thousand, six hundred fifty".