995661 has 6 divisors (see below), whose sum is σ = 1438190. Its totient is φ = 663768.

The previous prime is 995651. The next prime is 995663. The reversal of 995661 is 166599.

995661 is a `hidden beast` number, since 99 + 566 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 670761 + 324900 = 819^2 + 570^2 .

It is not a de Polignac number, because 995661 - 2¹⁸ = 733517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 995661.

It is not an unprimeable number, because it can be changed into a prime (995663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55306 + ... + 55323.

2⁹⁹⁵⁶⁶¹ is an apocalyptic number.

It is an amenable number.

995661 is a deficient number, since it is larger than the sum of its proper divisors (442529).

995661 is a wasteful number, since it uses less digits than its factorization.

995661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110635 (or 110632 counting only the distinct ones).

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

The square root of 995661 is about 997.8281415154. The cubic root of 995661 is about 99.8551569729.

The spelling of 995661 in words is "nine hundred ninety-five thousand, six hundred sixty-one".