665140341 has 4 divisors (see below), whose sum is σ = 886853792. Its totient is φ = 443426892.

The previous prime is 665140291. The next prime is 665140363. The reversal of 665140341 is 143041566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 665140341 - 2¹⁷ = 665009269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665140299 and 665140308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665140241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110856721 + ... + 110856726.

It is an arithmetic number, because the mean of its divisors is an integer number (221713448).

Almost surely, 2^665140341 is an apocalyptic number.

It is an amenable number.

665140341 is a deficient number, since it is larger than the sum of its proper divisors (221713451).

665140341 is a wasteful number, since it uses less digits than its factorization.

665140341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221713450.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 665140341 is about 25790.3148681826. The cubic root of 665140341 is about 872.9132711570.

The spelling of 665140341 in words is "six hundred sixty-five million, one hundred forty thousand, three hundred forty-one".