660078359 has 4 divisors (see below), whose sum is σ = 660237816. Its totient is φ = 659918904.

The previous prime is 660078317. The next prime is 660078401. The reversal of 660078359 is 953870066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 953870066 = 2 ⋅476935033.

It is an interprime number because it is at equal distance from previous prime (660078317) and next prime (660078401).

It is a cyclic number.

It is not a de Polignac number, because 660078359 - 2⁸ = 660078103 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 (660078659) 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, 73349 + ... + 81854.

It is an arithmetic number, because the mean of its divisors is an integer number (165059454).

Almost surely, 2^660078359 is an apocalyptic number.

660078359 is a deficient number, since it is larger than the sum of its proper divisors (159457).

660078359 is a wasteful number, since it uses less digits than its factorization.

660078359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159456.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 660078359 is about 25691.9901720361. The cubic root of 660078359 is about 870.6932242945.

The spelling of 660078359 in words is "six hundred sixty million, seventy-eight thousand, three hundred fifty-nine".