666048840666 has 32 divisors (see below), whose sum is σ = 1492473083328. Its totient is φ = 196378035840.

The previous prime is 666048840643. The next prime is 666048840713.

It is a happy number.

666048840666 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136371195 + ... + 136376078.

It is an arithmetic number, because the mean of its divisors is an integer number (46639783854).

Almost surely, 2^666048840666 is an apocalyptic number.

666048840666 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

666048840666 is an abundant number, since it is smaller than the sum of its proper divisors (826424242662).

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

666048840666 is a wasteful number, since it uses less digits than its factorization.

666048840666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272747326.

The product of its (nonzero) digits is 47775744, while the sum is 60.

The spelling of 666048840666 in words is "six hundred sixty-six billion, forty-eight million, eight hundred forty thousand, six hundred sixty-six".