106661666550 has 48 divisors (see below), whose sum is σ = 265152404160. Its totient is φ = 28375211040.

The previous prime is 106661666533. The next prime is 106661666561. The reversal of 106661666550 is 55666166601.

It is a super-2 number, since 2×106661666550² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 106661666550.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 785692 + ... + 911391.

It is an arithmetic number, because the mean of its divisors is an integer number (5524008420).

Almost surely, 2^106661666550 is an apocalyptic number.

106661666550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

106661666550 is an abundant number, since it is smaller than the sum of its proper divisors (158490737610).

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

106661666550 is a wasteful number, since it uses less digits than its factorization.

106661666550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697517 (or 1697512 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 106661666550 in words is "one hundred six billion, six hundred sixty-one million, six hundred sixty-six thousand, five hundred fifty".