666880214 has 32 divisors (see below), whose sum is σ = 1343091456. Its totient is φ = 239836320.

The previous prime is 666880213. The next prime is 666880217. The reversal of 666880214 is 412088666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666880213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164552 + ... + 168555.

It is an arithmetic number, because the mean of its divisors is an integer number (41971608).

Almost surely, 2^666880214 is an apocalyptic number.

666880214 is an abundant number, since it is smaller than the sum of its proper divisors (676211242).

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

666880214 is a wasteful number, since it uses less digits than its factorization.

666880214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333140.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 666880214 is about 25824.0239699393. The cubic root of 666880214 is about 873.6737301681.

The spelling of 666880214 in words is "six hundred sixty-six million, eight hundred eighty thousand, two hundred fourteen".