660664345 has 16 divisors (see below), whose sum is σ = 881191872. Its totient is φ = 471415360.

The previous prime is 660664339. The next prime is 660664357. The reversal of 660664345 is 543466066.

It is not a de Polignac number, because 660664345 - 2⁹ = 660663833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660664298 and 660664307.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110407 + ... + 116236.

It is an arithmetic number, because the mean of its divisors is an integer number (55074492).

Almost surely, 2^660664345 is an apocalyptic number.

It is an amenable number.

660664345 is a deficient number, since it is larger than the sum of its proper divisors (220527527).

660664345 is a wasteful number, since it uses less digits than its factorization.

660664345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226712.

The product of its (nonzero) digits is 311040, while the sum is 40.

The square root of 660664345 is about 25703.3917022637. The cubic root of 660664345 is about 870.9508013563.

The spelling of 660664345 in words is "six hundred sixty million, six hundred sixty-four thousand, three hundred forty-five".