666743260 has 24 divisors (see below), whose sum is σ = 1400648256. Its totient is φ = 266604480.

The previous prime is 666743249. The next prime is 666743261. The reversal of 666743260 is 62347666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666743261) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 101434 + ... + 107806.

It is an arithmetic number, because the mean of its divisors is an integer number (58360344).

Almost surely, 2^666743260 is an apocalyptic number.

It is an amenable number.

666743260 is an abundant number, since it is smaller than the sum of its proper divisors (733904996).

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

666743260 is a wasteful number, since it uses less digits than its factorization.

666743260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11613 (or 11611 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 40.

The square root of 666743260 is about 25821.3721556388. The cubic root of 666743260 is about 873.6139186750.

The spelling of 666743260 in words is "six hundred sixty-six million, seven hundred forty-three thousand, two hundred sixty".