665878044322 has 8 divisors (see below), whose sum is σ = 999658533456. Its totient is φ = 332658533172.

The previous prime is 665878044311. The next prime is 665878044343. The reversal of 665878044322 is 223440878566.

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

It is a super-3 number, since 3×665878044322³ (a number of 36 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140241528 + ... + 140246275.

It is an arithmetic number, because the mean of its divisors is an integer number (124957316682).

Almost surely, 2^665878044322 is an apocalyptic number.

665878044322 is a deficient number, since it is larger than the sum of its proper divisors (333780489134).

665878044322 is a wasteful number, since it uses less digits than its factorization.

665878044322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280488992.

The product of its (nonzero) digits is 15482880, while the sum is 55.

The spelling of 665878044322 in words is "six hundred sixty-five billion, eight hundred seventy-eight million, forty-four thousand, three hundred twenty-two".