8661263 has 8 divisors (see below), whose sum is σ = 9364656. Its totient is φ = 7963200.

The previous prime is 8661253. The next prime is 8661281. The reversal of 8661263 is 3621668.

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 8661263 - 2¹⁸ = 8399119 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 (8661203) 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, 2468 + ... + 4838.

It is an arithmetic number, because the mean of its divisors is an integer number (1170582).

Almost surely, 2^8661263 is an apocalyptic number.

8661263 is a deficient number, since it is larger than the sum of its proper divisors (703393).

8661263 is a wasteful number, since it uses less digits than its factorization.

8661263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2665.

The product of its digits is 10368, while the sum is 32.

The square root of 8661263 is about 2943.0023785244. The cubic root of 8661263 is about 205.3653054190.

It can be divided in two parts, 86612 and 63, that multiplied together give a triangular number (5456556 = T₃₃₀₃).

The spelling of 8661263 in words is "eight million, six hundred sixty-one thousand, two hundred sixty-three".