436661 has 4 divisors (see below), whose sum is σ = 438252. Its totient is φ = 435072.

The previous prime is 436651. The next prime is 436673. The reversal of 436661 is 166634.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 256036 + 180625 = 506^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 436661 - 2¹⁰ = 435637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 436661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (436621) 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 3 ways as a sum of consecutive naturals, for example, 266 + ... + 971.

It is an arithmetic number, because the mean of its divisors is an integer number (109563).

2⁴³⁶⁶⁶¹ is an apocalyptic number.

It is an amenable number.

436661 is a deficient number, since it is larger than the sum of its proper divisors (1591).

436661 is a wasteful number, since it uses less digits than its factorization.

436661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590.

The product of its digits is 2592, while the sum is 26.

The square root of 436661 is about 660.8032990232. The cubic root of 436661 is about 75.8661656594.

The spelling of 436661 in words is "four hundred thirty-six thousand, six hundred sixty-one".