1665335666157 has 32 divisors (see below), whose sum is σ = 2287948650624. Its totient is φ = 1076809574400.

The previous prime is 1665335666149. The next prime is 1665335666161. The reversal of 1665335666157 is 7516665335661.

It is not a de Polignac number, because 1665335666157 - 2³ = 1665335666149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1665335666157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665335666557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14325607 + ... + 14441387.

It is an arithmetic number, because the mean of its divisors is an integer number (71498395332).

Almost surely, 2^{1665335666157} is an apocalyptic number.

It is an amenable number.

1665335666157 is a deficient number, since it is larger than the sum of its proper divisors (622612984467).

1665335666157 is a wasteful number, since it uses less digits than its factorization.

1665335666157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116509.

The product of its digits is 61236000, while the sum is 60.

The spelling of 1665335666157 in words is "one trillion, six hundred sixty-five billion, three hundred thirty-five million, six hundred sixty-six thousand, one hundred fifty-seven".