666734 has 4 divisors (see below), whose sum is σ = 1000104. Its totient is φ = 333366.

The previous prime is 666733. The next prime is 666737. The reversal of 666734 is 437666.

666734 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 437666 = 2 ⋅218833.

It is a self number, because there is not a number n which added to its sum of digits gives 666734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166682 + ... + 166685.

It is an arithmetic number, because the mean of its divisors is an integer number (250026).

2⁶⁶⁶⁷³⁴ is an apocalyptic number.

666734 is a deficient number, since it is larger than the sum of its proper divisors (333370).

666734 is a wasteful number, since it uses less digits than its factorization.

666734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333369.

The product of its digits is 18144, while the sum is 32.

The square root of 666734 is about 816.5378129640. The cubic root of 666734 is about 87.3609874289.

It can be divided in two parts, 66 and 6734, that multiplied together give a palindrome (444444).

The spelling of 666734 in words is "six hundred sixty-six thousand, seven hundred thirty-four".