666148871 has 8 divisors (see below), whose sum is σ = 676085904. Its totient is φ = 656233920.

The previous prime is 666148867. The next prime is 666148877. The reversal of 666148871 is 178841666.

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 666148871 - 2² = 666148867 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 (666148877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61181 + ... + 71241.

It is an arithmetic number, because the mean of its divisors is an integer number (84510738).

Almost surely, 2^666148871 is an apocalyptic number.

666148871 is a deficient number, since it is larger than the sum of its proper divisors (9937033).

666148871 is a wasteful number, since it uses less digits than its factorization.

666148871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11041.

The product of its digits is 387072, while the sum is 47.

The square root of 666148871 is about 25809.8599570009. The cubic root of 666148871 is about 873.3542380670.

The spelling of 666148871 in words is "six hundred sixty-six million, one hundred forty-eight thousand, eight hundred seventy-one".