8768379661 has 4 divisors (see below), whose sum is σ = 8773790524. Its totient is φ = 8762968800.

The previous prime is 8768379647. The next prime is 8768379703. The reversal of 8768379661 is 1669738678.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2347402500 + 6420977161 = 48450^2 + 80131^2 .

It is a cyclic number.

It is not a de Polignac number, because 8768379661 - 2⁹ = 8768379149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8768379661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8768379601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2703000 + ... + 2706241.

It is an arithmetic number, because the mean of its divisors is an integer number (2193447631).

Almost surely, 2^8768379661 is an apocalyptic number.

It is an amenable number.

8768379661 is a deficient number, since it is larger than the sum of its proper divisors (5410863).

8768379661 is a wasteful number, since it uses less digits than its factorization.

8768379661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5410862.

The product of its digits is 18289152, while the sum is 61.

The square root of 8768379661 is about 93639.6265530785. The cubic root of 8768379661 is about 2062.0844566009.

The spelling of 8768379661 in words is "eight billion, seven hundred sixty-eight million, three hundred seventy-nine thousand, six hundred sixty-one".