8776661 has 4 divisors (see below), whose sum is σ = 8784300. Its totient is φ = 8769024.

The previous prime is 8776637. The next prime is 8776667. The reversal of 8776661 is 1666778.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1666778 = 2 ⋅833389.

It can be written as a sum of positive squares in 2 ways, for example, as 1674436 + 7102225 = 1294^2 + 2665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8776661 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8776667) 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, 1706 + ... + 4523.

It is an arithmetic number, because the mean of its divisors is an integer number (2196075).

Almost surely, 2^8776661 is an apocalyptic number.

It is an amenable number.

8776661 is a deficient number, since it is larger than the sum of its proper divisors (7639).

8776661 is a wasteful number, since it uses less digits than its factorization.

8776661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7638.

The product of its digits is 84672, while the sum is 41.

The square root of 8776661 is about 2962.5429954686. The cubic root of 8776661 is about 206.2733434246.

The spelling of 8776661 in words is "eight million, seven hundred seventy-six thousand, six hundred sixty-one".