8887766665 has 8 divisors (see below), whose sum is σ = 10666599048. Its totient is φ = 7109360640.

The previous prime is 8887766663. The next prime is 8887766669. The reversal of 8887766665 is 5666677888.

It can be written as a sum of positive squares in 4 ways, for example, as 396328464 + 8491438201 = 19908^2 + 92149^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8887766665 - 2¹ = 8887766663 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 8887766665.

It is not an unprimeable number, because it can be changed into a prime (8887766663) 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, 58776 + ... + 145705.

It is an arithmetic number, because the mean of its divisors is an integer number (1333324881).

Almost surely, 2^8887766665 is an apocalyptic number.

It is an amenable number.

8887766665 is a deficient number, since it is larger than the sum of its proper divisors (1778832383).

8887766665 is a wasteful number, since it uses less digits than its factorization.

8887766665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213179.

The product of its digits is 162570240, while the sum is 67.

The square root of 8887766665 is about 94274.9524794364. The cubic root of 8887766665 is about 2071.4011583700.

The spelling of 8887766665 in words is "eight billion, eight hundred eighty-seven million, seven hundred sixty-six thousand, six hundred sixty-five".