665043214449 has 8 divisors (see below), whose sum is σ = 886731884640. Its totient is φ = 443358343616.

The previous prime is 665043214439. The next prime is 665043214477. The reversal of 665043214449 is 944412340566.

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

It is a cyclic number.

It is not a de Polignac number, because 665043214449 - 2⁷ = 665043214321 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 665043214398 and 665043214407.

It is not an unprimeable number, because it can be changed into a prime (665043214439) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 512664 + ... + 1262105.

It is an arithmetic number, because the mean of its divisors is an integer number (110841485580).

Almost surely, 2^665043214449 is an apocalyptic number.

It is an amenable number.

665043214449 is a deficient number, since it is larger than the sum of its proper divisors (221688670191).

665043214449 is a wasteful number, since it uses less digits than its factorization.

665043214449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899679.

The product of its (nonzero) digits is 2488320, while the sum is 48.

The spelling of 665043214449 in words is "six hundred sixty-five billion, forty-three million, two hundred fourteen thousand, four hundred forty-nine".