916661 has 8 divisors (see below), whose sum is σ = 963480. Its totient is φ = 870912.

The previous prime is 916651. The next prime is 916679. The reversal of 916661 is 166619.

916661 = T_{148} + T_{149} + ... +
T_{205}.

It can be written as a sum of positive squares in 4 ways, for example, as 42436 + 874225 = 206^2 + 935^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^{k}-916661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a fibodiv number, since the Fibonacci-like sequence with seeds 9 and 16661 contains 916661 itself.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (916621) 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, 1901 + ... + 2333.

It is an arithmetic number, because the mean of its divisors is an integer number (120435).

2^{916661} is an apocalyptic number.

It is an amenable number.

916661 is a deficient number, since it is larger than the sum of its proper divisors (46819).

916661 is a wasteful number, since it uses less digits than its factorization.

916661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535.

The product of its digits is 1944, while the sum is 29.

The square root of 916661 is about 957.4241484316. The cubic root of 916661 is about 97.1410778839.

The spelling of 916661 in words is "nine hundred sixteen thousand, six hundred sixty-one".

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