600661 has 8 divisors (see below), whose sum is σ = 644760. Its totient is φ = 557568.

The previous prime is 600659. The next prime is 600673. The reversal of 600661 is 166006.

It is a happy number.

600661 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 4 ways, for example, as 119025 + 481636 = 345^2 + 694^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 600661 - 2¹ = 600659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (600601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1315 + ... + 1711.

It is an arithmetic number, because the mean of its divisors is an integer number (80595).

2⁶⁰⁰⁶⁶¹ is an apocalyptic number.

It is an amenable number.

600661 is a deficient number, since it is larger than the sum of its proper divisors (44099).

600661 is a wasteful number, since it uses less digits than its factorization.

600661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 600661 is about 775.0232254584. The cubic root of 600661 is about 84.3742278850.

Adding to 600661 its reverse (166006), we get a palindrome (766667).

The spelling of 600661 in words is "six hundred thousand, six hundred sixty-one".