666134121 has 8 divisors (see below), whose sum is σ = 888346944. Its totient is φ = 444005360.

The previous prime is 666134111. The next prime is 666134153. The reversal of 666134121 is 121431666.

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

It is a cyclic number.

It is not a de Polignac number, because 666134121 - 2¹¹ = 666132073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666134101) 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, 676 + ... + 36506.

It is an arithmetic number, because the mean of its divisors is an integer number (111043368).

Almost surely, 2^666134121 is an apocalyptic number.

It is an amenable number.

666134121 is a deficient number, since it is larger than the sum of its proper divisors (222212823).

666134121 is a wasteful number, since it uses less digits than its factorization.

666134121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42031.

The product of its digits is 5184, while the sum is 30.

The square root of 666134121 is about 25809.5742119083. The cubic root of 666134121 is about 873.3477920254.

Adding to 666134121 its reverse (121431666), we get a palindrome (787565787).

The spelling of 666134121 in words is "six hundred sixty-six million, one hundred thirty-four thousand, one hundred twenty-one".