1660538830877 has 4 divisors (see below), whose sum is σ = 1660562497500. Its totient is φ = 1660515164256.

The previous prime is 1660538830871. The next prime is 1660538830891. The reversal of 1660538830877 is 7780388350661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 719068384441 + 941470446436 = 847979^2 + 970294^2 .

It is a cyclic number.

It is not a de Polignac number, because 1660538830877 - 2¹² = 1660538826781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660538830871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11727752 + ... + 11868497.

It is an arithmetic number, because the mean of its divisors is an integer number (415140624375).

Almost surely, 2^{1660538830877} is an apocalyptic number.

It is an amenable number.

1660538830877 is a deficient number, since it is larger than the sum of its proper divisors (23666623).

1660538830877 is an equidigital number, since it uses as much as digits as its factorization.

1660538830877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23666622.

The product of its (nonzero) digits is 40642560, while the sum is 62.

The spelling of 1660538830877 in words is "one trillion, six hundred sixty billion, five hundred thirty-eight million, eight hundred thirty thousand, eight hundred seventy-seven".