8661329 has 8 divisors (see below), whose sum is σ = 8892288. Its totient is φ = 8433360.

The previous prime is 8661311. The next prime is 8661353. The reversal of 8661329 is 9231668.

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 8661329 - 2¹⁶ = 8595793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8661529) 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, 5864 + ... + 7190.

It is an arithmetic number, because the mean of its divisors is an integer number (1111536).

Almost surely, 2^8661329 is an apocalyptic number.

It is an amenable number.

8661329 is a deficient number, since it is larger than the sum of its proper divisors (230959).

8661329 is a wasteful number, since it uses less digits than its factorization.

8661329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495.

The product of its digits is 15552, while the sum is 35.

The square root of 8661329 is about 2943.0135915418. The cubic root of 8661329 is about 205.3658270548.

The spelling of 8661329 in words is "eight million, six hundred sixty-one thousand, three hundred twenty-nine".