739666 has 4 divisors (see below), whose sum is σ = 1109502. Its totient is φ = 369832.

The previous prime is 739649. The next prime is 739693. The reversal of 739666 is 666937.

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., 385641 + 354025 = 621^2 + 595^2 .

It is an unprimeable number.

739666 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 184915 + ... + 184918.

2⁷³⁹⁶⁶⁶ is an apocalyptic number.

739666 is a deficient number, since it is larger than the sum of its proper divisors (369836).

739666 is a wasteful number, since it uses less digits than its factorization.

739666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369835.

The product of its digits is 40824, while the sum is 37.

The square root of 739666 is about 860.0383712370. The cubic root of 739666 is about 90.4368066112.

The spelling of 739666 in words is "seven hundred thirty-nine thousand, six hundred sixty-six".