665530231206 has 8 divisors (see below), whose sum is σ = 1331060462424. Its totient is φ = 221843410400.

The previous prime is 665530231151. The next prime is 665530231217. The reversal of 665530231206 is 602132035566.

It is a sphenic number, since it is the product of 3 distinct primes.

665530231206 is an admirable number.

It is a super-2 number, since 2×665530231206² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55460852595 + ... + 55460852606.

It is an arithmetic number, because the mean of its divisors is an integer number (166382557803).

Almost surely, 2^665530231206 is an apocalyptic number.

665530231206 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665530231206 is a wasteful number, since it uses less digits than its factorization.

665530231206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110921705206.

The product of its (nonzero) digits is 194400, while the sum is 39.

The spelling of 665530231206 in words is "six hundred sixty-five billion, five hundred thirty million, two hundred thirty-one thousand, two hundred six".