660640601451525 has 12 divisors (see below), whose sum is σ = 1092259127733312. Its totient is φ = 352341654107440.

The previous prime is 660640601451499. The next prime is 660640601451539. The reversal of 660640601451525 is 525154106046066.

It is not a de Polignac number, because 660640601451525 - 2¹⁴ = 660640601435141 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 4404270676269 + ... + 4404270676418.

It is an arithmetic number, because the mean of its divisors is an integer number (91021593977776).

Almost surely, 2^{660640601451525} is an apocalyptic number.

It is an amenable number.

660640601451525 is a deficient number, since it is larger than the sum of its proper divisors (431618526281787).

660640601451525 is a wasteful number, since it uses less digits than its factorization.

660640601451525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8808541352700 (or 8808541352695 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 51.

The spelling of 660640601451525 in words is "six hundred sixty trillion, six hundred forty billion, six hundred one million, four hundred fifty-one thousand, five hundred twenty-five".