661182 has 16 divisors (see below), whose sum is σ = 1330560. Its totient is φ = 219032.

The previous prime is 661139. The next prime is 661183. The reversal of 661182 is 281166.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 661182.

It is not an unprimeable number, because it can be changed into a prime (661183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1369 + ... + 1787.

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

2⁶⁶¹¹⁸² is an apocalyptic number.

661182 is an abundant number, since it is smaller than the sum of its proper divisors (669378).

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

661182 is a wasteful number, since it uses less digits than its factorization.

661182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687.

The product of its digits is 576, while the sum is 24.

The square root of 661182 is about 813.1309857581. The cubic root of 661182 is about 87.1178216048.

The spelling of 661182 in words is "six hundred sixty-one thousand, one hundred eighty-two".