965661 has 8 divisors (see below), whose sum is σ = 1300704. Its totient is φ = 637200.

The previous prime is 965659. The next prime is 965677. The reversal of 965661 is 166569.

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

It is not a de Polignac number, because 965661 - 2¹ = 965659 is a prime.

It is a Curzon 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 965661.

It is not an unprimeable number, because it can be changed into a prime (965611) 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, 1291 + ... + 1896.

It is an arithmetic number, because the mean of its divisors is an integer number (162588).

2⁹⁶⁵⁶⁶¹ is an apocalyptic number.

It is an amenable number.

965661 is a deficient number, since it is larger than the sum of its proper divisors (335043).

965661 is a wasteful number, since it uses less digits than its factorization.

965661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3291.

The product of its digits is 9720, while the sum is 33.

The square root of 965661 is about 982.6805177676. The cubic root of 965661 is about 98.8420089950.

Multiplying 965661 by its sum of digits (33), we get a palindrome (31866813).

The spelling of 965661 in words is "nine hundred sixty-five thousand, six hundred sixty-one".