666027543377666 has 16 divisors (see below), whose sum is σ = 1002823531668000. Its totient is φ = 331755339756288.

The previous prime is 666027543377653. The next prime is 666027543377731. The reversal of 666027543377666 is 666773345720666.

It is a junction number, because it is equal to n+sod(n) for n = 666027543377593 and 666027543377602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 576155696 + ... + 577310523.

It is an arithmetic number, because the mean of its divisors is an integer number (62676470729250).

Almost surely, 2^{666027543377666} is an apocalyptic number.

666027543377666 is a deficient number, since it is larger than the sum of its proper divisors (336795988290334).

666027543377666 is a wasteful number, since it uses less digits than its factorization.

666027543377666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153467313.

The product of its (nonzero) digits is 5761082880, while the sum is 74.

The spelling of 666027543377666 in words is "six hundred sixty-six trillion, twenty-seven billion, five hundred forty-three million, three hundred seventy-seven thousand, six hundred sixty-six".