585401661 has 40 divisors (see below), whose sum is σ = 948023384. Its totient is φ = 357851520.

The previous prime is 585401659. The next prime is 585401669. The reversal of 585401661 is 166104585.

585401661 is a `hidden beast` number, since 58 + 540 + 1 + 6 + 61 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1454436 + 583947225 = 1206^2 + 24165^2 .

It is not a de Polignac number, because 585401661 - 2¹ = 585401659 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 (585401669) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 163551 + ... + 167091.

Almost surely, 2^585401661 is an apocalyptic number.

It is an amenable number.

585401661 is a deficient number, since it is larger than the sum of its proper divisors (362621723).

585401661 is a wasteful number, since it uses less digits than its factorization.

585401661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3723 (or 3714 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 585401661 is about 24195.0751393750. The cubic root of 585401661 is about 836.5360283606.

The spelling of 585401661 in words is "five hundred eighty-five million, four hundred one thousand, six hundred sixty-one".