266660064666 has 24 divisors (see below), whose sum is σ = 577773428544. Its totient is φ = 88885156680.

The previous prime is 266660064641. The next prime is 266660064677. The reversal of 266660064666 is 666460066662.

It is a super-2 number, since 2×266660064666² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1523071 + ... + 1689101.

It is an arithmetic number, because the mean of its divisors is an integer number (24073892856).

Almost surely, 2^266660064666 is an apocalyptic number.

266660064666 is an abundant number, since it is smaller than the sum of its proper divisors (311113363878).

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

266660064666 is a wasteful number, since it uses less digits than its factorization.

266660064666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255266 (or 255263 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 54.

The spelling of 266660064666 in words is "two hundred sixty-six billion, six hundred sixty million, sixty-four thousand, six hundred sixty-six".