666705107 has 8 divisors (see below), whose sum is σ = 670602240. Its totient is φ = 662816520.

The previous prime is 666705103. The next prime is 666705113. The reversal of 666705107 is 701507666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 666705107 - 2² = 666705103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666705101) 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, 214994 + ... + 218072.

It is an arithmetic number, because the mean of its divisors is an integer number (83825280).

Almost surely, 2^666705107 is an apocalyptic number.

666705107 is a deficient number, since it is larger than the sum of its proper divisors (3897133).

666705107 is a wasteful number, since it uses less digits than its factorization.

666705107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4273.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 666705107 is about 25820.6333578400. The cubic root of 666705107 is about 873.5972547757.

The spelling of 666705107 in words is "six hundred sixty-six million, seven hundred five thousand, one hundred seven".