660793039 has 4 divisors (see below), whose sum is σ = 695571640. Its totient is φ = 626014440.

The previous prime is 660793037. The next prime is 660793099. The reversal of 660793039 is 930397066.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930397066 = 2 ⋅465198533.

It is a cyclic number.

It is not a de Polignac number, because 660793039 - 2¹ = 660793037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660792986 and 660793004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660793031) 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, 17389272 + ... + 17389309.

It is an arithmetic number, because the mean of its divisors is an integer number (173892910).

Almost surely, 2^660793039 is an apocalyptic number.

660793039 is a deficient number, since it is larger than the sum of its proper divisors (34778601).

660793039 is a wasteful number, since it uses less digits than its factorization.

660793039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34778600.

The product of its (nonzero) digits is 183708, while the sum is 43.

The square root of 660793039 is about 25705.8950242936. The cubic root of 660793039 is about 871.0073499230.

The spelling of 660793039 in words is "six hundred sixty million, seven hundred ninety-three thousand, thirty-nine".