961660 has 24 divisors (see below), whose sum is σ = 2308320. Its totient is φ = 329664.

The previous prime is 961657. The next prime is 961661. The reversal of 961660 is 66169.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961661) 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, 3295 + ... + 3574.

It is an arithmetic number, because the mean of its divisors is an integer number (96180).

2⁹⁶¹⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

961660 is an abundant number, since it is smaller than the sum of its proper divisors (1346660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

961660 is a wasteful number, since it uses less digits than its factorization.

961660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6885 (or 6883 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 961660 is about 980.6426464314. The cubic root of 961660 is about 98.7053101207.

The spelling of 961660 in words is "nine hundred sixty-one thousand, six hundred sixty".