8817306666025 has 81 divisors (see below), whose sum is σ = 13016459547567. Its totient is φ = 5917885459200.

The previous prime is 8817306665941. The next prime is 8817306666029. The reversal of 8817306666025 is 5206666037188.

The square root of 8817306666025 is 2969395.

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

It can be written as a sum of positive squares in 13 ways, for example, as 7333334408169 + 1483972257856 = 2708013^2 + 1218184^2 .

It is not a de Polignac number, because 8817306666025 - 2¹⁵ = 8817306633257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8817306666029) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2123115349 + ... + 2123119501.

Almost surely, 2^{8817306666025} is an apocalyptic number.

8817306666025 is the 2969395-th square number.

8817306666025 is the 1484698-th centered octagonal number.

It is an amenable number.

8817306666025 is a deficient number, since it is larger than the sum of its proper divisors (4199152881542).

8817306666025 is an equidigital number, since it uses as much as digits as its factorization.

8817306666025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8364 (or 4182 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 58.

The spelling of 8817306666025 in words is "eight trillion, eight hundred seventeen billion, three hundred six million, six hundred sixty-six thousand, twenty-five".