100666651666550 has 12 divisors (see below), whose sum is σ = 187239972099876. Its totient is φ = 40266660666600.

The previous prime is 100666651666499. The next prime is 100666651666571. The reversal of 100666651666550 is 55666156666001.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 100666651666550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1006666516616 + ... + 1006666516715.

It is an arithmetic number, because the mean of its divisors is an integer number (15603331008323).

Almost surely, 2^{100666651666550} is an apocalyptic number.

100666651666550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100666651666550 is a deficient number, since it is larger than the sum of its proper divisors (86573320433326).

100666651666550 is a wasteful number, since it uses less digits than its factorization.

100666651666550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2013333033343 (or 2013333033338 counting only the distinct ones).

The product of its (nonzero) digits is 34992000, while the sum is 59.

The spelling of 100666651666550 in words is "one hundred trillion, six hundred sixty-six billion, six hundred fifty-one million, six hundred sixty-six thousand, five hundred fifty".