1665315168012 has 24 divisors (see below), whose sum is σ = 4317483769200. Its totient is φ = 555105055968.

The previous prime is 1665315167977. The next prime is 1665315168031. The reversal of 1665315168012 is 2108615135661.

It is a happy number.

1665315168012 is a `hidden beast` number, since 1 + 6 + 6 + 53 + 1 + 516 + 80 + 1 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7709792337 + ... + 7709792552.

It is an arithmetic number, because the mean of its divisors is an integer number (179895157050).

Almost surely, 2^{1665315168012} is an apocalyptic number.

1665315168012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1665315168012 is an abundant number, since it is smaller than the sum of its proper divisors (2652168601188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1665315168012 is a wasteful number, since it uses less digits than its factorization.

1665315168012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15419584902 (or 15419584894 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 1665315168012 in words is "one trillion, six hundred sixty-five billion, three hundred fifteen million, one hundred sixty-eight thousand, twelve".