660441601 has 8 divisors (see below), whose sum is σ = 694067264. Its totient is φ = 627646320.

The previous prime is 660441599. The next prime is 660441611. The reversal of 660441601 is 106144066.

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

It is a cyclic number.

It is not a de Polignac number, because 660441601 - 2¹ = 660441599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 660441601.

It is not an unprimeable number, because it can be changed into a prime (660441611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205965 + ... + 209146.

It is an arithmetic number, because the mean of its divisors is an integer number (86758408).

Almost surely, 2^660441601 is an apocalyptic number.

It is an amenable number.

660441601 is a deficient number, since it is larger than the sum of its proper divisors (33625663).

660441601 is a wasteful number, since it uses less digits than its factorization.

660441601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415191.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 660441601 is about 25699.0583679636. The cubic root of 660441601 is about 870.8529095533.

Adding to 660441601 its reverse (106144066), we get a palindrome (766585667).

It can be divided in two parts, 6604 and 41601, that added together give a triangular number (48205 = T₃₁₀).

The spelling of 660441601 in words is "six hundred sixty million, four hundred forty-one thousand, six hundred one".