8661575 has 24 divisors (see below), whose sum is σ = 11978400. Its totient is φ = 6168960.

The previous prime is 8661571. The next prime is 8661577. The reversal of 8661575 is 5751668.

It is a happy number.

It is not a de Polignac number, because 8661575 - 2² = 8661571 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8661571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8966 + ... + 9884.

It is an arithmetic number, because the mean of its divisors is an integer number (499100).

Almost surely, 2^8661575 is an apocalyptic number.

8661575 is a deficient number, since it is larger than the sum of its proper divisors (3316825).

8661575 is a wasteful number, since it uses less digits than its factorization.

8661575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971 (or 966 counting only the distinct ones).

The product of its digits is 50400, while the sum is 38.

The square root of 8661575 is about 2943.0553851397. The cubic root of 8661575 is about 205.3677713106.

The spelling of 8661575 in words is "eight million, six hundred sixty-one thousand, five hundred seventy-five".