8661249079 has 8 divisors (see below), whose sum is σ = 9899957120. Its totient is φ = 7422887736.

The previous prime is 8661249043. The next prime is 8661249083. The reversal of 8661249079 is 9709421668.

It is a happy number.

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 8661249079 - 2⁹ = 8661248567 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 (8661279079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30729 + ... + 135154.

It is an arithmetic number, because the mean of its divisors is an integer number (1237494640).

Almost surely, 2^8661249079 is an apocalyptic number.

8661249079 is a deficient number, since it is larger than the sum of its proper divisors (1238708041).

8661249079 is a wasteful number, since it uses less digits than its factorization.

8661249079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173349.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 8661249079 is about 93065.8319631861. The cubic root of 8661249079 is about 2053.6519539302.

The spelling of 8661249079 in words is "eight billion, six hundred sixty-one million, two hundred forty-nine thousand, seventy-nine".