661056022 has 8 divisors (see below), whose sum is σ = 1081728072. Its totient is φ = 300480000.

The previous prime is 661056013. The next prime is 661056029. The reversal of 661056022 is 220650166.

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 (661056029) 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, 15023979 + ... + 15024022.

It is an arithmetic number, because the mean of its divisors is an integer number (135216009).

Almost surely, 2^661056022 is an apocalyptic number.

661056022 is a deficient number, since it is larger than the sum of its proper divisors (420672050).

661056022 is a wasteful number, since it uses less digits than its factorization.

661056022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30048014.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 661056022 is about 25711.0097429097. The cubic root of 661056022 is about 871.1228826904.

It can be divided in two parts, 66105 and 6022, that added together give a palindrome (72127).

The spelling of 661056022 in words is "six hundred sixty-one million, fifty-six thousand, twenty-two".