661334562222 has 8 divisors (see below), whose sum is σ = 1322669124456. Its totient is φ = 220444854072.

The previous prime is 661334562209. The next prime is 661334562223. The reversal of 661334562222 is 222265433166.

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

661334562222 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661334562223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55111213513 + ... + 55111213524.

It is an arithmetic number, because the mean of its divisors is an integer number (165333640557).

Almost surely, 2^661334562222 is an apocalyptic number.

661334562222 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.

661334562222 is a wasteful number, since it uses less digits than its factorization.

661334562222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110222427042.

The product of its digits is 622080, while the sum is 42.

Adding to 661334562222 its reverse (222265433166), we get a palindrome (883599995388).

The spelling of 661334562222 in words is "six hundred sixty-one billion, three hundred thirty-four million, five hundred sixty-two thousand, two hundred twenty-two".