665888325 has 24 divisors (see below), whose sum is σ = 1126543968. Its totient is φ = 346879680.

The previous prime is 665888323. The next prime is 665888329. The reversal of 665888325 is 523888566.

It is not a de Polignac number, because 665888325 - 2¹ = 665888323 is a prime.

It is a super-2 number, since 2×665888325² = 886814522742611250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665888323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100014 + ... + 106463.

It is an arithmetic number, because the mean of its divisors is an integer number (46939332).

Almost surely, 2^665888325 is an apocalyptic number.

It is an amenable number.

665888325 is a deficient number, since it is larger than the sum of its proper divisors (460655643).

665888325 is a wasteful number, since it uses less digits than its factorization.

665888325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206533 (or 206528 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 51.

The square root of 665888325 is about 25804.8120512435. The cubic root of 665888325 is about 873.2403603058.

The spelling of 665888325 in words is "six hundred sixty-five million, eight hundred eighty-eight thousand, three hundred twenty-five".