666710 has 48 divisors (see below), whose sum is σ = 1436400. Its totient is φ = 221760.

The previous prime is 666707. The next prime is 666727. The reversal of 666710 is 17666.

It is a self number, because there is not a number n which added to its sum of digits gives 666710.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22976 + ... + 23004.

It is an arithmetic number, because the mean of its divisors is an integer number (29925).

2⁶⁶⁶⁷¹⁰ is an apocalyptic number.

666710 is an abundant number, since it is smaller than the sum of its proper divisors (769690).

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

666710 is a wasteful number, since it uses less digits than its factorization.

666710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 666710 is about 816.5231166354. The cubic root of 666710 is about 87.3599391903.

It can be divided in two parts, 66 and 6710, that added together give a palindrome (6776).

The spelling of 666710 in words is "six hundred sixty-six thousand, seven hundred ten".