666808148 has 12 divisors (see below), whose sum is σ = 1174643232. Its totient is φ = 331195800.

The previous prime is 666808127. The next prime is 666808183. The reversal of 666808148 is 841808666.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 551390 + ... + 552597.

It is an arithmetic number, because the mean of its divisors is an integer number (97886936).

Almost surely, 2^666808148 is an apocalyptic number.

It is an amenable number.

666808148 is a deficient number, since it is larger than the sum of its proper divisors (507835084).

666808148 is a wasteful number, since it uses less digits than its factorization.

666808148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104142 (or 1104140 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

The square root of 666808148 is about 25822.6286036104. The cubic root of 666808148 is about 873.6422580297.

The spelling of 666808148 in words is "six hundred sixty-six million, eight hundred eight thousand, one hundred forty-eight".