666546127 has 4 divisors (see below), whose sum is σ = 717818920. Its totient is φ = 615273336.

The previous prime is 666546119. The next prime is 666546161. The reversal of 666546127 is 721645666.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 666546127 - 2³ = 666546119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666546197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25636377 + ... + 25636402.

It is an arithmetic number, because the mean of its divisors is an integer number (179454730).

Almost surely, 2^666546127 is an apocalyptic number.

666546127 is a deficient number, since it is larger than the sum of its proper divisors (51272793).

666546127 is a wasteful number, since it uses less digits than its factorization.

666546127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51272792.

The product of its digits is 362880, while the sum is 43.

The square root of 666546127 is about 25817.5546285856. The cubic root of 666546127 is about 873.5278110137.

The spelling of 666546127 in words is "six hundred sixty-six million, five hundred forty-six thousand, one hundred twenty-seven".