660432365 has 4 divisors (see below), whose sum is σ = 792518844. Its totient is φ = 528345888.

The previous prime is 660432359. The next prime is 660432379. The reversal of 660432365 is 563234066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 120055849 + 540376516 = 10957^2 + 23246^2 .

It is a cyclic number.

It is not a de Polignac number, because 660432365 - 2⁶ = 660432301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 66043232 + ... + 66043241.

It is an arithmetic number, because the mean of its divisors is an integer number (198129711).

Almost surely, 2^660432365 is an apocalyptic number.

It is an amenable number.

660432365 is a deficient number, since it is larger than the sum of its proper divisors (132086479).

660432365 is a wasteful number, since it uses less digits than its factorization.

660432365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132086478.

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 660432365 is about 25698.8786720355. The cubic root of 660432365 is about 870.8488500297.

The spelling of 660432365 in words is "six hundred sixty million, four hundred thirty-two thousand, three hundred sixty-five".