666667340 has 24 divisors (see below), whose sum is σ = 1408391712. Its totient is φ = 265068800.

The previous prime is 666667303. The next prime is 666667349. The reversal of 666667340 is 43766666.

666667340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 666667291 and 666667300.

It is not an unprimeable number, because it can be changed into a prime (666667349) 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, 96461 + ... + 103140.

It is an arithmetic number, because the mean of its divisors is an integer number (58682988).

Almost surely, 2^666667340 is an apocalyptic number.

It is an amenable number.

666667340 is an abundant number, since it is smaller than the sum of its proper divisors (741724372).

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

666667340 is a wasteful number, since it uses less digits than its factorization.

666667340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199777 (or 199775 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 44.

The square root of 666667340 is about 25819.9020137568. The cubic root of 666667340 is about 873.5807588416.

The spelling of 666667340 in words is "six hundred sixty-six million, six hundred sixty-seven thousand, three hundred forty".