661032 has 24 divisors (see below), whose sum is σ = 1790490. Its totient is φ = 220320.

The previous prime is 661027. The next prime is 661049. The reversal of 661032 is 230166.

It is a happy number.

661032 is a `hidden beast` number, since 661 + 0 + 3 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 527076 + 133956 = 726^2 + 366^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 660996 and 661014.

It is an unprimeable number.

661032 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4519 + ... + 4662.

2⁶⁶¹⁰³² is an apocalyptic number.

It is an amenable number.

661032 is an abundant number, since it is smaller than the sum of its proper divisors (1129458).

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

661032 is a wasteful number, since it uses less digits than its factorization.

661032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9193 (or 9186 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 661032 is about 813.0387444642. The cubic root of 661032 is about 87.1112330702. Note that the first 3 decimals are identical.

Adding to 661032 its reverse (230166), we get a palindrome (891198).

The spelling of 661032 in words is "six hundred sixty-one thousand, thirty-two".