1660265555613 has 16 divisors (see below), whose sum is σ = 2537571764736. Its totient is φ = 945856937520.

The previous prime is 1660265555609. The next prime is 1660265555639. The reversal of 1660265555613 is 3165555620661.

It is not a de Polignac number, because 1660265555613 - 2² = 1660265555609 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660265555603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119419431 + ... + 119433332.

It is an arithmetic number, because the mean of its divisors is an integer number (158598235296).

Almost surely, 2^{1660265555613} is an apocalyptic number.

It is an amenable number.

1660265555613 is a deficient number, since it is larger than the sum of its proper divisors (877306209123).

1660265555613 is a wasteful number, since it uses less digits than its factorization.

1660265555613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238853104.

The product of its (nonzero) digits is 4860000, while the sum is 51.

The spelling of 1660265555613 in words is "one trillion, six hundred sixty billion, two hundred sixty-five million, five hundred fifty-five thousand, six hundred thirteen".