4815666025 has 9 divisors (see below), whose sum is σ = 5971856151. Its totient is φ = 3852255240.

The previous prime is 4815665999. The next prime is 4815666047. The reversal of 4815666025 is 5206665184.

The square root of 4815666025 is 69395.

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

It can be written as a sum of positive squares in only one way, i.e., 1733639769 + 3082026256 = 41637^2 + 55516^2 .

It is not a de Polignac number, because 4815666025 - 2⁵ = 4815665993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 340036 + ... + 353914.

Almost surely, 2^4815666025 is an apocalyptic number.

4815666025 is the 69395-th square number.

4815666025 is the 34698-th centered octagonal number.

It is an amenable number.

4815666025 is a deficient number, since it is larger than the sum of its proper divisors (1156190126).

4815666025 is an frugal number, since it uses more digits than its factorization.

4815666025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27768 (or 13884 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The cubic root of 4815666025 is about 1688.6985095347.

The spelling of 4815666025 in words is "four billion, eight hundred fifteen million, six hundred sixty-six thousand, twenty-five".