664560716348 has 48 divisors (see below), whose sum is σ = 1235377059840. Its totient is φ = 311723745024.

The previous prime is 664560716249. The next prime is 664560716363. The reversal of 664560716348 is 843617065466.

It is a junction number, because it is equal to n+sod(n) for n = 664560716293 and 664560716302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32916665 + ... + 32936847.

It is an arithmetic number, because the mean of its divisors is an integer number (25737022080).

Almost surely, 2^664560716348 is an apocalyptic number.

664560716348 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

664560716348 is a deficient number, since it is larger than the sum of its proper divisors (570816343492).

664560716348 is a wasteful number, since it uses less digits than its factorization.

664560716348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21746 (or 21744 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 56.

The spelling of 664560716348 in words is "six hundred sixty-four billion, five hundred sixty million, seven hundred sixteen thousand, three hundred forty-eight".