661734 has 24 divisors (see below), whose sum is σ = 1452360. Its totient is φ = 217728.

The previous prime is 661721. The next prime is 661741. The reversal of 661734 is 437166.

It is a junction number, because it is equal to n+sod(n) for n = 661698 and 661707.

It is a congruent number.

It is an unprimeable number.

661734 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 11 ways as a sum of consecutive naturals, for example, 1557 + ... + 1935.

It is an arithmetic number, because the mean of its divisors is an integer number (60515).

2⁶⁶¹⁷³⁴ is an apocalyptic number.

661734 is an abundant number, since it is smaller than the sum of its proper divisors (790626).

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

661734 is a wasteful number, since it uses less digits than its factorization.

661734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 481 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 661734 is about 813.4703436512. The cubic root of 661734 is about 87.1420588350.

The spelling of 661734 in words is "six hundred sixty-one thousand, seven hundred thirty-four".