665022025 has 12 divisors (see below), whose sum is σ = 824947200. Its totient is φ = 531811280.

The previous prime is 665022019. The next prime is 665022049. The reversal of 665022025 is 520220566.

It is not a de Polignac number, because 665022025 - 2¹⁵ = 664989257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 665021984 and 665022002.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123336 + ... + 128614.

It is an arithmetic number, because the mean of its divisors is an integer number (68745600).

Almost surely, 2^665022025 is an apocalyptic number.

It is an amenable number.

665022025 is a deficient number, since it is larger than the sum of its proper divisors (159925175).

665022025 is a wasteful number, since it uses less digits than its factorization.

665022025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10328 (or 10323 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 665022025 is about 25788.0209593524. The cubic root of 665022025 is about 872.8615097844.

The spelling of 665022025 in words is "six hundred sixty-five million, twenty-two thousand, twenty-five".