665105422 has 8 divisors (see below), whose sum is σ = 1011709872. Its totient is φ = 327868800.

The previous prime is 665105411. The next prime is 665105423. The reversal of 665105422 is 224501566.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665105423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2341779 + ... + 2342062.

It is an arithmetic number, because the mean of its divisors is an integer number (126463734).

Almost surely, 2^665105422 is an apocalyptic number.

665105422 is a deficient number, since it is larger than the sum of its proper divisors (346604450).

665105422 is a wasteful number, since it uses less digits than its factorization.

665105422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4683914.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 665105422 is about 25789.6378803581. The cubic root of 665105422 is about 872.8979952871.

Adding to 665105422 its reverse (224501566), we get a palindrome (889606988).

The spelling of 665105422 in words is "six hundred sixty-five million, one hundred five thousand, four hundred twenty-two".