639166703060 has 48 divisors (see below), whose sum is σ = 1396560992400. Its totient is φ = 245423668224.

The previous prime is 639166703057. The next prime is 639166703093. The reversal of 639166703060 is 60307661936.

It is a happy number.

639166703060 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 2768022544 + 636398680516 = 52612^2 + 797746^2 .

It is a junction number, because it is equal to n+sod(n) for n = 639166702996 and 639166703014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3084665 + ... + 3285344.

It is an arithmetic number, because the mean of its divisors is an integer number (29095020675).

Almost surely, 2^639166703060 is an apocalyptic number.

It is an amenable number.

639166703060 is an abundant number, since it is smaller than the sum of its proper divisors (757394289340).

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

639166703060 is a wasteful number, since it uses less digits than its factorization.

639166703060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6370220 (or 6370218 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 47.

The spelling of 639166703060 in words is "six hundred thirty-nine billion, one hundred sixty-six million, seven hundred three thousand, sixty".