661324 has 6 divisors (see below), whose sum is σ = 1157324. Its totient is φ = 330660.

The previous prime is 661321. The next prime is 661327. The reversal of 661324 is 423166.

It is an interprime number because it is at equal distance from previous prime (661321) and next prime (661327).

It is a junction number, because it is equal to n+sod(n) for n = 661295 and 661304.

It is not an unprimeable number, because it can be changed into a prime (661321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82662 + ... + 82669.

2⁶⁶¹³²⁴ is an apocalyptic number.

It is an amenable number.

661324 is a deficient number, since it is larger than the sum of its proper divisors (496000).

661324 is a wasteful number, since it uses less digits than its factorization.

661324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165335 (or 165333 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 661324 is about 813.2182978758. The cubic root of 661324 is about 87.1240578328.

The spelling of 661324 in words is "six hundred sixty-one thousand, three hundred twenty-four".