666718760 has 32 divisors (see below), whose sum is σ = 1501073640. Its totient is φ = 266517504.

The previous prime is 666718757. The next prime is 666718763. The reversal of 666718760 is 67817666.

666718760 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (666718757) and next prime (666718763).

It can be written as a sum of positive squares in 4 ways, for example, as 664917796 + 1800964 = 25786^2 + 1342^2 .

It is not an unprimeable number, because it can be changed into a prime (666718763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72164 + ... + 80876.

Almost surely, 2^666718760 is an apocalyptic number.

It is an amenable number.

666718760 is an abundant number, since it is smaller than the sum of its proper divisors (834354880).

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

666718760 is a wasteful number, since it uses less digits than its factorization.

666718760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10637 (or 10633 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 666718760 is about 25820.8977380725. The cubic root of 666718760 is about 873.6032180028.

The spelling of 666718760 in words is "six hundred sixty-six million, seven hundred eighteen thousand, seven hundred sixty".