706666 has 4 divisors (see below), whose sum is σ = 1060002. Its totient is φ = 353332.

The previous prime is 706661. The next prime is 706669. The reversal of 706666 is 666607.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 594441 + 112225 = 771^2 + 335^2 .

706666 is a modest number, since divided by 6666 gives 70 as remainder.

It is not an unprimeable number, because it can be changed into a prime (706661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176665 + ... + 176668.

2⁷⁰⁶⁶⁶⁶ is an apocalyptic number.

706666 is a deficient number, since it is larger than the sum of its proper divisors (353336).

706666 is a wasteful number, since it uses less digits than its factorization.

706666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353335.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 706666 is about 840.6342843353. The cubic root of 706666 is about 89.0713563164.

The spelling of 706666 in words is "seven hundred six thousand, six hundred sixty-six".