665322242 has 54 divisors (see below), whose sum is σ = 1148507451. Its totient is φ = 288905760.

The previous prime is 665322233. The next prime is 665322257. The reversal of 665322242 is 242223566.

It can be written as a sum of positive squares in 5 ways, for example, as 28718881 + 636603361 = 5359^2 + 25231^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=18239.

It is a junction number, because it is equal to n+sod(n) for n = 665322199 and 665322208.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 10906892 + ... + 10906952.

Almost surely, 2^665322242 is an apocalyptic number.

665322242 is a deficient number, since it is larger than the sum of its proper divisors (483185209).

665322242 is a wasteful number, since it uses less digits than its factorization.

665322242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 99 counting only the distinct ones).

The product of its digits is 34560, while the sum is 32.

The square root of 665322242 is about 25793.8411641229. The cubic root of 665322242 is about 872.9928379866.

Multiplying 665322242 by its sum of digits (32), we get a square (21290311744 = 145912²).

The spelling of 665322242 in words is "six hundred sixty-five million, three hundred twenty-two thousand, two hundred forty-two".