3666181808 has 20 divisors (see below), whose sum is σ = 7105263240. Its totient is φ = 1832565504.

The previous prime is 3666181793. The next prime is 3666181811. The reversal of 3666181808 is 8081816663.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 28163 + ... + 90141.

It is an arithmetic number, because the mean of its divisors is an integer number (355263162).

Almost surely, 2^3666181808 is an apocalyptic number.

It is an amenable number.

3666181808 is a deficient number, since it is larger than the sum of its proper divisors (3439081432).

3666181808 is a wasteful number, since it uses less digits than its factorization.

3666181808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65684 (or 65678 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 3666181808 is about 60549.0033609142. The cubic root of 3666181808 is about 1541.9536974068.

The spelling of 3666181808 in words is "three billion, six hundred sixty-six million, one hundred eighty-one thousand, eight hundred eight".