86662528225 has 81 divisors (see below), whose sum is σ = 135571362777. Its totient is φ = 54769740480.

The previous prime is 86662528171. The next prime is 86662528229. The reversal of 86662528225 is 52282526668.

It is a happy number.

The square root of 86662528225 is 294385.

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 22337394849 + 64325133376 = 149457^2 + 253624^2 .

It is not a de Polignac number, because 86662528225 - 2¹¹ = 86662526177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86662528229) 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, 133944852 + ... + 133945498.

Almost surely, 2^86662528225 is an apocalyptic number.

86662528225 is the 294385-th square number.

86662528225 is the 147193-rd centered octagonal number.

It is an amenable number.

86662528225 is a deficient number, since it is larger than the sum of its proper divisors (48908834552).

86662528225 is an equidigital number, since it uses as much as digits as its factorization.

86662528225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344 (or 672 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 52.

The spelling of 86662528225 in words is "eighty-six billion, six hundred sixty-two million, five hundred twenty-eight thousand, two hundred twenty-five".