665172411884 has 24 divisors (see below), whose sum is σ = 1184107888320. Its totient is φ = 326858981904.

The previous prime is 665172411863. The next prime is 665172411889. The reversal of 665172411884 is 488114271566.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (665172411889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472907 + ... + 1246589.

It is an arithmetic number, because the mean of its divisors is an integer number (49337828680).

Almost surely, 2^665172411884 is an apocalyptic number.

It is an amenable number.

665172411884 is a deficient number, since it is larger than the sum of its proper divisors (518935476436).

665172411884 is a wasteful number, since it uses less digits than its factorization.

665172411884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777389 (or 777387 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 53.

The spelling of 665172411884 in words is "six hundred sixty-five billion, one hundred seventy-two million, four hundred eleven thousand, eight hundred eighty-four".