665532345 has 32 divisors (see below), whose sum is σ = 1084748544. Its totient is φ = 348364800.

The previous prime is 665532319. The next prime is 665532353. The reversal of 665532345 is 543235566.

It is not a de Polignac number, because 665532345 - 2⁸ = 665532089 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255369 + ... + 257961.

It is an arithmetic number, because the mean of its divisors is an integer number (33898392).

Almost surely, 2^665532345 is an apocalyptic number.

It is an amenable number.

665532345 is a deficient number, since it is larger than the sum of its proper divisors (419216199).

665532345 is a wasteful number, since it uses less digits than its factorization.

665532345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2913.

The product of its digits is 324000, while the sum is 39.

The square root of 665532345 is about 25797.9135784272. The cubic root of 665532345 is about 873.0847228401.

The spelling of 665532345 in words is "six hundred sixty-five million, five hundred thirty-two thousand, three hundred forty-five".