665134688626 has 8 divisors (see below), whose sum is σ = 1011754174464. Its totient is φ = 327883297140.

The previous prime is 665134688597. The next prime is 665134688627. The reversal of 665134688626 is 626886431566.

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

It is not an unprimeable number, because it can be changed into a prime (665134688627) by changing a digit.

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, 2342023410 + ... + 2342023693.

It is an arithmetic number, because the mean of its divisors is an integer number (126469271808).

Almost surely, 2^665134688626 is an apocalyptic number.

665134688626 is a deficient number, since it is larger than the sum of its proper divisors (346619485838).

665134688626 is a wasteful number, since it uses less digits than its factorization.

665134688626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4684047176.

The product of its digits is 59719680, while the sum is 61.

The spelling of 665134688626 in words is "six hundred sixty-five billion, one hundred thirty-four million, six hundred eighty-eight thousand, six hundred twenty-six".