665147226514 has 8 divisors (see below), whose sum is σ = 1056410300988. Its totient is φ = 313010459520.

The previous prime is 665147226451. The next prime is 665147226551. The reversal of 665147226514 is 415622741566.

It can be written as a sum of positive squares in 2 ways, for example, as 521525175889 + 143622050625 = 722167^2 + 378975^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9781576827 + ... + 9781576894.

Almost surely, 2^665147226514 is an apocalyptic number.

665147226514 is a deficient number, since it is larger than the sum of its proper divisors (391263074474).

665147226514 is a wasteful number, since it uses less digits than its factorization.

665147226514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19563153740.

The product of its digits is 2419200, while the sum is 49.

The spelling of 665147226514 in words is "six hundred sixty-five billion, one hundred forty-seven million, two hundred twenty-six thousand, five hundred fourteen".