666654159 has 8 divisors (see below), whose sum is σ = 935655040. Its totient is φ = 421044696.

The previous prime is 666654151. The next prime is 666654169. The reversal of 666654159 is 951456666.

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

It is not a de Polignac number, because 666654159 - 2³ = 666654151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666654151) 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, 5847787 + ... + 5847900.

It is an arithmetic number, because the mean of its divisors is an integer number (116956880).

Almost surely, 2^666654159 is an apocalyptic number.

666654159 is a deficient number, since it is larger than the sum of its proper divisors (269000881).

666654159 is a wasteful number, since it uses less digits than its factorization.

666654159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11695709.

The product of its digits is 1166400, while the sum is 48.

The square root of 666654159 is about 25819.6467636565. The cubic root of 666654159 is about 873.5750014755.

The spelling of 666654159 in words is "six hundred sixty-six million, six hundred fifty-four thousand, one hundred fifty-nine".