666534055 has 8 divisors (see below), whose sum is σ = 872553744. Its totient is φ = 484752000.

The previous prime is 666534049. The next prime is 666534059. The reversal of 666534055 is 550435666.

It is a happy number.

666534055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 666534055 - 2¹⁹ = 666009767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666533999 and 666534017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666534059) 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, 6059346 + ... + 6059455.

It is an arithmetic number, because the mean of its divisors is an integer number (109069218).

Almost surely, 2^666534055 is an apocalyptic number.

666534055 is a deficient number, since it is larger than the sum of its proper divisors (206019689).

666534055 is a wasteful number, since it uses less digits than its factorization.

666534055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12118817.

The product of its (nonzero) digits is 324000, while the sum is 40.

The square root of 666534055 is about 25817.3208331151. The cubic root of 666534055 is about 873.5225374145.

The spelling of 666534055 in words is "six hundred sixty-six million, five hundred thirty-four thousand, fifty-five".