8331661 has 8 divisors (see below), whose sum is σ = 8999424. Its totient is φ = 7667760.

The previous prime is 8331647. The next prime is 8331667. The reversal of 8331661 is 1661338.

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

It is a cyclic number.

It is not a de Polignac number, because 8331661 - 2⁵ = 8331629 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 (8331667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4860 + ... + 6346.

It is an arithmetic number, because the mean of its divisors is an integer number (1124928).

Almost surely, 2^8331661 is an apocalyptic number.

It is an amenable number.

8331661 is a deficient number, since it is larger than the sum of its proper divisors (667763).

8331661 is a wasteful number, since it uses less digits than its factorization.

8331661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1931.

The product of its digits is 2592, while the sum is 28.

The square root of 8331661 is about 2886.4616747845. The cubic root of 8331661 is about 202.7265036530.

Adding to 8331661 its reverse (1661338), we get a palindrome (9992999).

The spelling of 8331661 in words is "eight million, three hundred thirty-one thousand, six hundred sixty-one".