1665022566125 has 16 divisors (see below), whose sum is σ = 2080460925504. Its totient is φ = 1330407307600.

The previous prime is 1665022566071. The next prime is 1665022566127. The reversal of 1665022566125 is 5216652205661.

It is not a de Polignac number, because 1665022566125 - 2³⁰ = 1663948824301 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1665022566125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665022566127) 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, 7949939 + ... + 8156688.

It is an arithmetic number, because the mean of its divisors is an integer number (130028807844).

Almost surely, 2^{1665022566125} is an apocalyptic number.

It is an amenable number.

1665022566125 is a deficient number, since it is larger than the sum of its proper divisors (415438359379).

1665022566125 is an equidigital number, since it uses as much as digits as its factorization.

1665022566125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16107469 (or 16107459 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 47.

The spelling of 1665022566125 in words is "one trillion, six hundred sixty-five billion, twenty-two million, five hundred sixty-six thousand, one hundred twenty-five".