516615660 has 144 divisors (see below), whose sum is σ = 1725403680. Its totient is φ = 124078080.

The previous prime is 516615653. The next prime is 516615679. The reversal of 516615660 is 66516615.

It is a Smith number, since the sum of its digits (36) 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 (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 222586 + ... + 224894.

It is an arithmetic number, because the mean of its divisors is an integer number (11981970).

Almost surely, 2^516615660 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 516615660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (862701840).

516615660 is an abundant number, since it is smaller than the sum of its proper divisors (1208788020).

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

516615660 is a wasteful number, since it uses less digits than its factorization.

516615660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448 (or 2443 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 516615660 is about 22729.1808035398. The cubic root of 516615660 is about 802.3968015898.

The spelling of 516615660 in words is "five hundred sixteen million, six hundred fifteen thousand, six hundred sixty".