666680148 has 36 divisors (see below), whose sum is σ = 1721079360. Its totient is φ = 217497936.

The previous prime is 666680137. The next prime is 666680167. The reversal of 666680148 is 841086666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 195318 + ... + 198701.

It is an arithmetic number, because the mean of its divisors is an integer number (47807760).

Almost surely, 2^666680148 is an apocalyptic number.

It is an amenable number.

666680148 is an abundant number, since it is smaller than the sum of its proper divisors (1054399212).

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

666680148 is a wasteful number, since it uses less digits than its factorization.

666680148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394076 (or 394071 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 666680148 is about 25820.1500382937. The cubic root of 666680148 is about 873.5863532113.

The spelling of 666680148 in words is "six hundred sixty-six million, six hundred eighty thousand, one hundred forty-eight".