661134 has 16 divisors (see below), whose sum is σ = 1330560. Its totient is φ = 219000.

The previous prime is 661121. The next prime is 661139. The reversal of 661134 is 431166.

It is a self number, because there is not a number n which added to its sum of digits gives 661134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661139) by changing a digit.

661134 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, 1287 + ... + 1725.

It is an arithmetic number, because the mean of its divisors is an integer number (83160).

2⁶⁶¹¹³⁴ is an apocalyptic number.

661134 is an abundant number, since it is smaller than the sum of its proper divisors (669426).

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

661134 is a wasteful number, since it uses less digits than its factorization.

661134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695.

The product of its digits is 432, while the sum is 21.

The square root of 661134 is about 813.1014696826. The cubic root of 661134 is about 87.1157133822.

The spelling of 661134 in words is "six hundred sixty-one thousand, one hundred thirty-four".