665127873434 has 8 divisors (see below), whose sum is σ = 997699737888. Its totient is φ = 332561294140.

The previous prime is 665127873367. The next prime is 665127873437. The reversal of 665127873434 is 434378721566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 665127873434.

It is not an unprimeable number, because it can be changed into a prime (665127873437) 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, 990062 + ... + 1520025.

It is an arithmetic number, because the mean of its divisors is an integer number (124712467236).

Almost surely, 2^665127873434 is an apocalyptic number.

665127873434 is a deficient number, since it is larger than the sum of its proper divisors (332571864454).

665127873434 is a wasteful number, since it uses less digits than its factorization.

665127873434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2642580.

The product of its digits is 20321280, while the sum is 56.

The spelling of 665127873434 in words is "six hundred sixty-five billion, one hundred twenty-seven million, eight hundred seventy-three thousand, four hundred thirty-four".