668081185 has 16 divisors (see below), whose sum is σ = 809479296. Its totient is φ = 529296768.

The previous prime is 668081179. The next prime is 668081209. The reversal of 668081185 is 581180866.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 668081185 - 2³ = 668081177 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373804 + ... + 375586.

It is an arithmetic number, because the mean of its divisors is an integer number (50592456).

Almost surely, 2^668081185 is an apocalyptic number.

It is an amenable number.

668081185 is a deficient number, since it is larger than the sum of its proper divisors (141398111).

668081185 is a wasteful number, since it uses less digits than its factorization.

668081185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472.

The product of its (nonzero) digits is 92160, while the sum is 43.

The square root of 668081185 is about 25847.2664899018. The cubic root of 668081185 is about 874.1978760637.

The spelling of 668081185 in words is "six hundred sixty-eight million, eighty-one thousand, one hundred eighty-five".