1665225693 has 12 divisors (see below), whose sum is σ = 2439204768. Its totient is φ = 1094514120.

The previous prime is 1665225649. The next prime is 1665225713. The reversal of 1665225693 is 3965225661.

1665225693 is a `hidden beast` number, since 1 + 6 + 65 + 22 + 569 + 3 = 666.

It is not a de Polignac number, because 1665225693 - 2¹⁰ = 1665224669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665225623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1302355 + ... + 1303632.

It is an arithmetic number, because the mean of its divisors is an integer number (203267064).

Almost surely, 2^1665225693 is an apocalyptic number.

It is an amenable number.

1665225693 is a deficient number, since it is larger than the sum of its proper divisors (773979075).

1665225693 is a wasteful number, since it uses less digits than its factorization.

1665225693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2606064 (or 2606061 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

The square root of 1665225693 is about 40807.1769790560. The cubic root of 1665225693 is about 1185.2893103362.

The spelling of 1665225693 in words is "one billion, six hundred sixty-five million, two hundred twenty-five thousand, six hundred ninety-three".