660422061 has 24 divisors (see below), whose sum is σ = 1028341496. Its totient is φ = 406010880.

The previous prime is 660422057. The next prime is 660422117. The reversal of 660422061 is 160224066.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 70660836 + 589761225 = 8406^2 + 24285^2 .

It is not a de Polignac number, because 660422061 - 2² = 660422057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660422011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152421 + ... + 156693.

Almost surely, 2^660422061 is an apocalyptic number.

It is an amenable number.

660422061 is a deficient number, since it is larger than the sum of its proper divisors (367919435).

660422061 is a wasteful number, since it uses less digits than its factorization.

660422061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5613 (or 5610 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 660422061 is about 25698.6781955804. The cubic root of 660422061 is about 870.8443210404.

The spelling of 660422061 in words is "six hundred sixty million, four hundred twenty-two thousand, sixty-one".