599661 has 6 divisors (see below), whose sum is σ = 866190. Its totient is φ = 399768.

The previous prime is 599657. The next prime is 599663. The reversal of 599661 is 166995.

599661 is a `hidden beast` number, since 599 + 6 + 61 = 666.

599661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 447561 + 152100 = 669^2 + 390^2 .

It is not a de Polignac number, because 599661 - 2² = 599657 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (599663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33306 + ... + 33323.

It is an arithmetic number, because the mean of its divisors is an integer number (144365).

2⁵⁹⁹⁶⁶¹ is an apocalyptic number.

It is an amenable number.

599661 is a deficient number, since it is larger than the sum of its proper divisors (266529).

599661 is a wasteful number, since it uses less digits than its factorization.

599661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66635 (or 66632 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 599661 is about 774.3778147649. The cubic root of 599661 is about 84.3273788891.

The spelling of 599661 in words is "five hundred ninety-nine thousand, six hundred sixty-one".