576661 has 4 divisors (see below), whose sum is σ = 580492. Its totient is φ = 572832.

The previous prime is 576659. The next prime is 576671. The reversal of 576661 is 166675.

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 93636 + 483025 = 306^2 + 695^2 .

It is a cyclic number.

It is not a de Polignac number, because 576661 - 2¹ = 576659 is a prime.

It is a Duffinian number.

576661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (576671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1680 + ... + 1993.

It is an arithmetic number, because the mean of its divisors is an integer number (145123).

2⁵⁷⁶⁶⁶¹ is an apocalyptic number.

It is an amenable number.

576661 is a deficient number, since it is larger than the sum of its proper divisors (3831).

576661 is a wasteful number, since it uses less digits than its factorization.

576661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3830.

The product of its digits is 7560, while the sum is 31.

The square root of 576661 is about 759.3819855646. The cubic root of 576661 is about 83.2351679637.

The spelling of 576661 in words is "five hundred seventy-six thousand, six hundred sixty-one".