520661002620 has 48 divisors (see below), whose sum is σ = 1590382700928. Its totient is φ = 126220848960.

The previous prime is 520661002619. The next prime is 520661002621. The reversal of 520661002620 is 26200166025.

It is an interprime number because it is at equal distance from previous prime (520661002619) and next prime (520661002621).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520661002621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394439494 + ... + 394440813.

It is an arithmetic number, because the mean of its divisors is an integer number (33132972936).

Almost surely, 2^520661002620 is an apocalyptic number.

It is an amenable number.

520661002620 is an abundant number, since it is smaller than the sum of its proper divisors (1069721698308).

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

520661002620 is a wasteful number, since it uses less digits than its factorization.

520661002620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788880330 (or 788880328 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 520661002620 its reverse (26200166025), we get a palindrome (546861168645).

The spelling of 520661002620 in words is "five hundred twenty billion, six hundred sixty-one million, two thousand, six hundred twenty".