666706710 has 16 divisors (see below), whose sum is σ = 1600096176. Its totient is φ = 177788448.

The previous prime is 666706709. The next prime is 666706717. The reversal of 666706710 is 17607666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666706717) 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, 11111749 + ... + 11111808.

It is an arithmetic number, because the mean of its divisors is an integer number (100006011).

Almost surely, 2^666706710 is an apocalyptic number.

666706710 is an abundant number, since it is smaller than the sum of its proper divisors (933389466).

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

666706710 is a wasteful number, since it uses less digits than its factorization.

666706710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22223567.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 666706710 is about 25820.6643988880. The cubic root of 666706710 is about 873.5979549230.

The spelling of 666706710 in words is "six hundred sixty-six million, seven hundred six thousand, seven hundred ten".