66165110666 has 8 divisors (see below), whose sum is σ = 103562781984. Its totient is φ = 31644183340.

The previous prime is 66165110659. The next prime is 66165110677. The reversal of 66165110666 is 66601156166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 719185940 + ... + 719186031.

It is an arithmetic number, because the mean of its divisors is an integer number (12945347748).

Almost surely, 2^66165110666 is an apocalyptic number.

66165110666 is a deficient number, since it is larger than the sum of its proper divisors (37397671318).

66165110666 is a wasteful number, since it uses less digits than its factorization.

66165110666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438371996.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 66165110666 in words is "sixty-six billion, one hundred sixty-five million, one hundred ten thousand, six hundred sixty-six".