666340068 has 12 divisors (see below), whose sum is σ = 1554793520. Its totient is φ = 222113352.

The previous prime is 666340057. The next prime is 666340079. The reversal of 666340068 is 860043666.

It is an interprime number because it is at equal distance from previous prime (666340057) and next prime (666340079).

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27764158 + ... + 27764181.

Almost surely, 2^666340068 is an apocalyptic number.

It is an amenable number.

666340068 is an abundant number, since it is smaller than the sum of its proper divisors (888453452).

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

666340068 is a wasteful number, since it uses less digits than its factorization.

666340068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55528346 (or 55528344 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 666340068 is about 25813.5636439450. The cubic root of 666340068 is about 873.4377863270.

The spelling of 666340068 in words is "six hundred sixty-six million, three hundred forty thousand, sixty-eight".