1665235453 has 12 divisors (see below), whose sum is σ = 1945657152. Its totient is φ = 1421047320.

The previous prime is 1665235447. The next prime is 1665235483. The reversal of 1665235453 is 3545325661.

It is not a de Polignac number, because 1665235453 - 2¹³ = 1665227261 is a prime.

It is a super-2 number, since 2×1665235453² = 5546018227856230418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665235483) 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, 63733 + ... + 85978.

It is an arithmetic number, because the mean of its divisors is an integer number (162138096).

Almost surely, 2^1665235453 is an apocalyptic number.

It is an amenable number.

1665235453 is a deficient number, since it is larger than the sum of its proper divisors (280421699).

1665235453 is a wasteful number, since it uses less digits than its factorization.

1665235453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149952 (or 149945 counting only the distinct ones).

The product of its digits is 324000, while the sum is 40.

The square root of 1665235453 is about 40807.2965656879. The cubic root of 1665235453 is about 1185.2916260185.

The spelling of 1665235453 in words is "one billion, six hundred sixty-five million, two hundred thirty-five thousand, four hundred fifty-three".