505050660 has 96 divisors (see below), whose sum is σ = 1625500800. Its totient is φ = 130032000.

The previous prime is 505050653. The next prime is 505050661. The reversal of 505050660 is 66050505.

505050660 is a `hidden beast` number, since 50 + 50 + 506 + 60 = 666.

It is a super-3 number, since 3×505050660³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (505050661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 466 + ... + 31785.

It is an arithmetic number, because the mean of its divisors is an integer number (16932300).

Almost surely, 2^505050660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505050660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (812750400).

505050660 is an abundant number, since it is smaller than the sum of its proper divisors (1120450140).

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

505050660 is a wasteful number, since it uses less digits than its factorization.

505050660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32298 (or 32290 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 505050660 is about 22473.3321961831. The cubic root of 505050660 is about 796.3640519710.

The spelling of 505050660 in words is "five hundred five million, fifty thousand, six hundred sixty".