8666679025 has 27 divisors (see below), whose sum is σ = 11027885409. Its totient is φ = 6756462720.

The previous prime is 8666679023. The next prime is 8666679061. The reversal of 8666679025 is 5209766668.

It is a happy number.

The square root of 8666679025 is 93095.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2649263841 + 6017415184 = 51471^2 + 77572^2 .

It is not a de Polignac number, because 8666679025 - 2¹ = 8666679023 is a prime.

It is a super-2 number, since 2×8666679025² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8666679023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 20015209 + ... + 20015641.

Almost surely, 2^8666679025 is an apocalyptic number.

8666679025 is the 93095-th square number.

8666679025 is the 46548-th centered octagonal number.

It is an amenable number.

8666679025 is a deficient number, since it is larger than the sum of its proper divisors (2361206384).

8666679025 is an frugal number, since it uses more digits than its factorization.

8666679025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 55.

The cubic root of 8666679025 is about 2054.0810255956.

The spelling of 8666679025 in words is "eight billion, six hundred sixty-six million, six hundred seventy-nine thousand, twenty-five".