3866865253 has 4 divisors (see below), whose sum is σ = 3867265708. Its totient is φ = 3866464800.

The previous prime is 3866865217. The next prime is 3866865283. The reversal of 3866865253 is 3525686683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3525686683 = 19 ⋅185562457.

It can be written as a sum of positive squares in 2 ways, for example, as 2674751524 + 1192113729 = 51718^2 + 34527^2 .

It is a cyclic number.

It is not a de Polignac number, because 3866865253 - 2¹⁷ = 3866734181 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 3866865253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3866865283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185376 + ... + 205177.

It is an arithmetic number, because the mean of its divisors is an integer number (966816427).

Almost surely, 2^3866865253 is an apocalyptic number.

It is an amenable number.

3866865253 is a deficient number, since it is larger than the sum of its proper divisors (400455).

3866865253 is an equidigital number, since it uses as much as digits as its factorization.

3866865253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400454.

The product of its digits is 6220800, while the sum is 52.

The square root of 3866865253 is about 62184.1238018194. The cubic root of 3866865253 is about 1569.5904449180.

The spelling of 3866865253 in words is "three billion, eight hundred sixty-six million, eight hundred sixty-five thousand, two hundred fifty-three".