660661039 has 8 divisors (see below), whose sum is σ = 689673600. Its totient is φ = 631672536.

The previous prime is 660661037. The next prime is 660661063. The reversal of 660661039 is 930166066.

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 660661039 - 2¹ = 660661037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660660989 and 660661007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660661031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71524 + ... + 80230.

It is an arithmetic number, because the mean of its divisors is an integer number (86209200).

Almost surely, 2^660661039 is an apocalyptic number.

660661039 is a deficient number, since it is larger than the sum of its proper divisors (29012561).

660661039 is a wasteful number, since it uses less digits than its factorization.

660661039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12029.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 660661039 is about 25703.3273916044. The cubic root of 660661039 is about 870.9493485923.

The spelling of 660661039 in words is "six hundred sixty million, six hundred sixty-one thousand, thirty-nine".