661112422 has 8 divisors (see below), whose sum is σ = 1050002136. Its totient is φ = 311111712.

The previous prime is 661112357. The next prime is 661112443. The reversal of 661112422 is 224211166.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9722208 + ... + 9722275.

It is an arithmetic number, because the mean of its divisors is an integer number (131250267).

Almost surely, 2^661112422 is an apocalyptic number.

661112422 is a deficient number, since it is larger than the sum of its proper divisors (388889714).

661112422 is a wasteful number, since it uses less digits than its factorization.

661112422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19444502.

The product of its digits is 1152, while the sum is 25.

The square root of 661112422 is about 25712.1065259150. The cubic root of 661112422 is about 871.1476561497.

Adding to 661112422 its reverse (224211166), we get a palindrome (885323588).

The spelling of 661112422 in words is "six hundred sixty-one million, one hundred twelve thousand, four hundred twenty-two".