667171880 has 16 divisors (see below), whose sum is σ = 1501136820. Its totient is φ = 266868736.

The previous prime is 667171867. The next prime is 667171889. The reversal of 667171880 is 88171766.

It can be written as a sum of positive squares in 2 ways, for example, as 650148004 + 17023876 = 25498^2 + 4126^2 .

It is not an unprimeable number, because it can be changed into a prime (667171889) 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 3 ways as a sum of consecutive naturals, for example, 8339609 + ... + 8339688.

Almost surely, 2^667171880 is an apocalyptic number.

It is an amenable number.

667171880 is an abundant number, since it is smaller than the sum of its proper divisors (833964940).

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

667171880 is a wasteful number, since it uses less digits than its factorization.

667171880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16679308 (or 16679304 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 667171880 is about 25829.6705360328. The cubic root of 667171880 is about 873.8010812657.

The spelling of 667171880 in words is "six hundred sixty-seven million, one hundred seventy-one thousand, eight hundred eighty".