666664135 has 8 divisors (see below), whose sum is σ = 807918336. Its totient is φ = 528050400.

The previous prime is 666664133. The next prime is 666664183. The reversal of 666664135 is 531466666.

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

It is not a de Polignac number, because 666664135 - 2¹ = 666664133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666664091 and 666664100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666664133) 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, 659559 + ... + 660568.

It is an arithmetic number, because the mean of its divisors is an integer number (100989792).

Almost surely, 2^666664135 is an apocalyptic number.

666664135 is a deficient number, since it is larger than the sum of its proper divisors (141254201).

666664135 is a wasteful number, since it uses less digits than its factorization.

666664135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320233.

The product of its digits is 466560, while the sum is 43.

The square root of 666664135 is about 25819.8399491554. The cubic root of 666664135 is about 873.5793589276.

The spelling of 666664135 in words is "six hundred sixty-six million, six hundred sixty-four thousand, one hundred thirty-five".