665305748073145 has 64 divisors (see below), whose sum is σ = 840161370746880. Its totient is φ = 505131149721600.

The previous prime is 665305748073139. The next prime is 665305748073157. The reversal of 665305748073145 is 541370847503566.

It is not a de Polignac number, because 665305748073145 - 2³¹ = 665303600589497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14661716697 + ... + 14661762073.

It is an arithmetic number, because the mean of its divisors is an integer number (13127521417920).

Almost surely, 2^{665305748073145} is an apocalyptic number.

It is an amenable number.

665305748073145 is a deficient number, since it is larger than the sum of its proper divisors (174855622673735).

665305748073145 is a wasteful number, since it uses less digits than its factorization.

665305748073145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52826.

The product of its (nonzero) digits is 254016000, while the sum is 64.

The spelling of 665305748073145 in words is "six hundred sixty-five trillion, three hundred five billion, seven hundred forty-eight million, seventy-three thousand, one hundred forty-five".