6666607 has 6 divisors (see below), whose sum is σ = 6905288. Its totient is φ = 6435912.

The previous prime is 6666599. The next prime is 6666613. The reversal of 6666607 is 7066666.

It is not a de Polignac number, because 6666607 - 2³ = 6666599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666617) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3123 + ... + 4804.

Almost surely, 2^6666607 is an apocalyptic number.

6666607 is a deficient number, since it is larger than the sum of its proper divisors (238681).

6666607 is an equidigital number, since it uses as much as digits as its factorization.

6666607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7985 (or 7956 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 6666607 is about 2581.9773430454. The cubic root of 6666607 is about 188.2066442897.

The spelling of 6666607 in words is "six million, six hundred sixty-six thousand, six hundred seven".