665147432841 has 4 divisors (see below), whose sum is σ = 886863243792. Its totient is φ = 443431621892.

The previous prime is 665147432767. The next prime is 665147432849. The reversal of 665147432841 is 148234741566.

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 a cyclic number.

It is not a de Polignac number, because 665147432841 - 2¹⁸ = 665147170697 is a prime.

It is a super-2 number, since 2×665147432841² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (665147432849) 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, 110857905471 + ... + 110857905476.

It is an arithmetic number, because the mean of its divisors is an integer number (221715810948).

Almost surely, 2^665147432841 is an apocalyptic number.

It is an amenable number.

665147432841 is a deficient number, since it is larger than the sum of its proper divisors (221715810951).

665147432841 is a wasteful number, since it uses less digits than its factorization.

665147432841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221715810950.

The product of its digits is 3870720, while the sum is 51.

The spelling of 665147432841 in words is "six hundred sixty-five billion, one hundred forty-seven million, four hundred thirty-two thousand, eight hundred forty-one".