667734 has 16 divisors (see below), whose sum is σ = 1349040. Its totient is φ = 220320.

The previous prime is 667727. The next prime is 667741. The reversal of 667734 is 437766.

It is an interprime number because it is at equal distance from previous prime (667727) and next prime (667741).

It is a junction number, because it is equal to n+sod(n) for n = 667695 and 667704.

It is a congruent number.

It is an unprimeable number.

667734 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 in 7 ways as a sum of consecutive naturals, for example, 144 + ... + 1164.

It is an arithmetic number, because the mean of its divisors is an integer number (84315).

2⁶⁶⁷⁷³⁴ is an apocalyptic number.

667734 is an abundant number, since it is smaller than the sum of its proper divisors (681306).

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

667734 is a wasteful number, since it uses less digits than its factorization.

667734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135.

The product of its digits is 21168, while the sum is 33.

The square root of 667734 is about 817.1499250444. The cubic root of 667734 is about 87.4046416936.

The spelling of 667734 in words is "six hundred sixty-seven thousand, seven hundred thirty-four".