666171012 has 24 divisors (see below), whose sum is σ = 1673968576. Its totient is φ = 204975648.

The previous prime is 666171001. The next prime is 666171013. The reversal of 666171012 is 210171666.

It is not an unprimeable number, because it can be changed into a prime (666171013) 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, 2135008 + ... + 2135319.

Almost surely, 2^666171012 is an apocalyptic number.

It is an amenable number.

666171012 is an abundant number, since it is smaller than the sum of its proper divisors (1007797564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666171012 is a wasteful number, since it uses less digits than its factorization.

666171012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4270347 (or 4270345 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 666171012 is about 25810.2888786623. The cubic root of 666171012 is about 873.3639139432.

The spelling of 666171012 in words is "six hundred sixty-six million, one hundred seventy-one thousand, twelve".