665550401435 has 8 divisors (see below), whose sum is σ = 806568011856. Its totient is φ = 527168634400.

The previous prime is 665550401413. The next prime is 665550401437. The reversal of 665550401435 is 534104055566.

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

It is not a de Polignac number, because 665550401435 - 2⁶ = 665550401371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665550401437) 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, 658960289 + ... + 658961298.

It is an arithmetic number, because the mean of its divisors is an integer number (100821001482).

Almost surely, 2^665550401435 is an apocalyptic number.

665550401435 is a deficient number, since it is larger than the sum of its proper divisors (141017610421).

665550401435 is a wasteful number, since it uses less digits than its factorization.

665550401435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317921693.

The product of its (nonzero) digits is 1080000, while the sum is 44.

The spelling of 665550401435 in words is "six hundred sixty-five billion, five hundred fifty million, four hundred one thousand, four hundred thirty-five".