1665025204216 has 32 divisors (see below), whose sum is σ = 3415548228480. Its totient is φ = 754648559200.

The previous prime is 1665025204187. The next prime is 1665025204237. The reversal of 1665025204216 is 6124025205661.

It is a happy number.

It is a congruent number.

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, 27232780 + ... + 27293851.

It is an arithmetic number, because the mean of its divisors is an integer number (106735882140).

Almost surely, 2^{1665025204216} is an apocalyptic number.

It is an amenable number.

1665025204216 is an abundant number, since it is smaller than the sum of its proper divisors (1750523024264).

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

1665025204216 is a wasteful number, since it uses less digits than its factorization.

1665025204216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54526995 (or 54526991 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 1665025204216 in words is "one trillion, six hundred sixty-five billion, twenty-five million, two hundred four thousand, two hundred sixteen".