665223504206 has 8 divisors (see below), whose sum is σ = 1012728320040. Its totient is φ = 327647397528.

The previous prime is 665223504161. The next prime is 665223504217. The reversal of 665223504206 is 602405322566.

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

It is a super-2 number, since 2×665223504206² (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, 2482177121 + ... + 2482177388.

It is an arithmetic number, because the mean of its divisors is an integer number (126591040005).

Almost surely, 2^665223504206 is an apocalyptic number.

665223504206 is a deficient number, since it is larger than the sum of its proper divisors (347504815834).

665223504206 is a wasteful number, since it uses less digits than its factorization.

665223504206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4964354578.

The product of its (nonzero) digits is 518400, while the sum is 41.

The spelling of 665223504206 in words is "six hundred sixty-five billion, two hundred twenty-three million, five hundred four thousand, two hundred six".