8661895 has 8 divisors (see below), whose sum is σ = 11339280. Its totient is φ = 6299520.

The previous prime is 8661889. The next prime is 8661899. The reversal of 8661895 is 5981668.

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

It is not a de Polignac number, because 8661895 - 2⁷ = 8661767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8661899) 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, 78690 + ... + 78799.

It is an arithmetic number, because the mean of its divisors is an integer number (1417410).

Almost surely, 2^8661895 is an apocalyptic number.

8661895 is a deficient number, since it is larger than the sum of its proper divisors (2677385).

8661895 is a wasteful number, since it uses less digits than its factorization.

8661895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157505.

The product of its digits is 103680, while the sum is 43.

The square root of 8661895 is about 2943.1097499074. The cubic root of 8661895 is about 205.3703003686.

The spelling of 8661895 in words is "eight million, six hundred sixty-one thousand, eight hundred ninety-five".