660444044061 has 8 divisors (see below), whose sum is σ = 880596275104. Its totient is φ = 440293921200.

The previous prime is 660444044059. The next prime is 660444044069. The reversal of 660444044061 is 160440444066.

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

It is not a de Polignac number, because 660444044061 - 2¹ = 660444044059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660444044069) 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 7 ways as a sum of consecutive naturals, for example, 477411 + ... + 1244511.

It is an arithmetic number, because the mean of its divisors is an integer number (110074534388).

Almost surely, 2^660444044061 is an apocalyptic number.

It is an amenable number.

660444044061 is a deficient number, since it is larger than the sum of its proper divisors (220152231043).

660444044061 is a wasteful number, since it uses less digits than its factorization.

660444044061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054091.

The product of its (nonzero) digits is 221184, while the sum is 39.

The spelling of 660444044061 in words is "six hundred sixty billion, four hundred forty-four million, forty-four thousand, sixty-one".