8661279 has 16 divisors (see below), whose sum is σ = 13340160. Its totient is φ = 4940160.

The previous prime is 8661253. The next prime is 8661281. The reversal of 8661279 is 9721668.

It is not a de Polignac number, because 8661279 - 2⁹ = 8660767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8661239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7159 + ... + 8280.

It is an arithmetic number, because the mean of its divisors is an integer number (833760).

Almost surely, 2^8661279 is an apocalyptic number.

8661279 is a deficient number, since it is larger than the sum of its proper divisors (4678881).

8661279 is a wasteful number, since it uses less digits than its factorization.

8661279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15470.

The product of its digits is 36288, while the sum is 39.

The square root of 8661279 is about 2943.0050968355. The cubic root of 8661279 is about 205.3654318764.

It can be divided in two parts, 866 and 1279, that added together give a triangular number (2145 = T₆₅).

The spelling of 8661279 in words is "eight million, six hundred sixty-one thousand, two hundred seventy-nine".