709966 has 4 divisors (see below), whose sum is σ = 1064952. Its totient is φ = 354982.

The previous prime is 709963. The next prime is 709967. The reversal of 709966 is 669907.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 669907 = 7 ⋅95701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (709963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177490 + ... + 177493.

It is an arithmetic number, because the mean of its divisors is an integer number (266238).

2⁷⁰⁹⁹⁶⁶ is an apocalyptic number.

709966 is a deficient number, since it is larger than the sum of its proper divisors (354986).

709966 is a wasteful number, since it uses less digits than its factorization.

709966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354985.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 709966 is about 842.5948017879. The cubic root of 709966 is about 89.2097899931.

The spelling of 709966 in words is "seven hundred nine thousand, nine hundred sixty-six".