8445661 has 8 divisors (see below), whose sum is σ = 9673664. Its totient is φ = 7223040.

The previous prime is 8445659. The next prime is 8445677. The reversal of 8445661 is 1665448.

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 8445661 - 2¹ = 8445659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8445601) 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, 2941 + ... + 5053.

It is an arithmetic number, because the mean of its divisors is an integer number (1209208).

Almost surely, 2^8445661 is an apocalyptic number.

It is an amenable number.

8445661 is a deficient number, since it is larger than the sum of its proper divisors (1228003).

8445661 is a wasteful number, since it uses less digits than its factorization.

8445661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691.

The product of its digits is 23040, while the sum is 34.

The square root of 8445661 is about 2906.1419442278. The cubic root of 8445661 is about 203.6469367227.

The spelling of 8445661 in words is "eight million, four hundred forty-five thousand, six hundred sixty-one".