667880180 has 24 divisors (see below), whose sum is σ = 1530053280. Its totient is φ = 242865440.

The previous prime is 667880149. The next prime is 667880183. The reversal of 667880180 is 81088766.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667880183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1517690 + ... + 1518129.

It is an arithmetic number, because the mean of its divisors is an integer number (63752220).

Almost surely, 2^667880180 is an apocalyptic number.

It is an amenable number.

667880180 is an abundant number, since it is smaller than the sum of its proper divisors (862173100).

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

667880180 is a wasteful number, since it uses less digits than its factorization.

667880180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3035839 (or 3035837 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 667880180 is about 25843.3778751927. The cubic root of 667880180 is about 874.1101942201.

The spelling of 667880180 in words is "six hundred sixty-seven million, eight hundred eighty thousand, one hundred eighty".