536661 has 6 divisors (see below), whose sum is σ = 775190. Its totient is φ = 357768.

The previous prime is 536651. The next prime is 536671. The reversal of 536661 is 166635.

It is an interprime number because it is at equal distance from previous prime (536651) and next prime (536671).

It can be written as a sum of positive squares in only one way, i.e., 463761 + 72900 = 681^2 + 270^2 .

It is not a de Polignac number, because 536661 - 2⁷ = 536533 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 (536621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29806 + ... + 29823.

2⁵³⁶⁶⁶¹ is an apocalyptic number.

It is an amenable number.

536661 is a deficient number, since it is larger than the sum of its proper divisors (238529).

536661 is a wasteful number, since it uses less digits than its factorization.

536661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59635 (or 59632 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 536661 is about 732.5714982171. The cubic root of 536661 is about 81.2643398753.

The spelling of 536661 in words is "five hundred thirty-six thousand, six hundred sixty-one".