665161222 has 8 divisors (see below), whose sum is σ = 1088445672. Its totient is φ = 302346000.

The previous prime is 665161201. The next prime is 665161283. The reversal of 665161222 is 222161566.

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

It is a super-3 number, since 3×665161222³ (a number of 27 digits) contains 333 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, 15117279 + ... + 15117322.

It is an arithmetic number, because the mean of its divisors is an integer number (136055709).

Almost surely, 2^665161222 is an apocalyptic number.

665161222 is a deficient number, since it is larger than the sum of its proper divisors (423284450).

665161222 is a wasteful number, since it uses less digits than its factorization.

665161222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30234614.

The product of its digits is 8640, while the sum is 31.

The square root of 665161222 is about 25790.7196875155. The cubic root of 665161222 is about 872.9224056259.

The spelling of 665161222 in words is "six hundred sixty-five million, one hundred sixty-one thousand, two hundred twenty-two".