105551666 has 32 divisors (see below), whose sum is σ = 177284160. Its totient is φ = 46728000.

The previous prime is 105551659. The next prime is 105551687. The reversal of 105551666 is 666155501.

It is a super-2 number, since 2×105551666² = 22282308390751112, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148520 + ... + 149228.

It is an arithmetic number, because the mean of its divisors is an integer number (5540130).

Almost surely, 2^105551666 is an apocalyptic number.

105551666 is a deficient number, since it is larger than the sum of its proper divisors (71732494).

105551666 is a wasteful number, since it uses less digits than its factorization.

105551666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 105551666 is about 10273.8340457689. The cubic root of 105551666 is about 472.5941747469.

It can be divided in two parts, 10555 and 1666, that added together give a palindrome (12221).

The spelling of 105551666 in words is "one hundred five million, five hundred fifty-one thousand, six hundred sixty-six".