520660650 has 48 divisors (see below), whose sum is σ = 1295506368. Its totient is φ = 138384000.

The previous prime is 520660607. The next prime is 520660687. The reversal of 520660650 is 56066025.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 41070 + ... + 52230.

It is an arithmetic number, because the mean of its divisors is an integer number (26989716).

Almost surely, 2^520660650 is an apocalyptic number.

520660650 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 520660650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (647753184).

520660650 is an abundant number, since it is smaller than the sum of its proper divisors (774845718).

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

520660650 is a wasteful number, since it uses less digits than its factorization.

520660650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11487 (or 11482 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 520660650 is about 22817.9896134607. The cubic root of 520660650 is about 804.4855579156.

It can be divided in two parts, 5206 and 60650, that added together give a palindrome (65856).

The spelling of 520660650 in words is "five hundred twenty million, six hundred sixty thousand, six hundred fifty".