105556663 has 2 divisors, whose sum is σ = 105556664. Its totient is φ = 105556662.

The previous prime is 105556603. The next prime is 105556669. The reversal of 105556663 is 366655501.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 105556663 - 2¹⁷ = 105425591 is a prime.

It is a super-2 number, since 2×105556663² = 22284418207391138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105556669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52778331 + 52778332.

It is an arithmetic number, because the mean of its divisors is an integer number (52778332).

Almost surely, 2^105556663 is an apocalyptic number.

105556663 is a deficient number, since it is larger than the sum of its proper divisors (1).

105556663 is an equidigital number, since it uses as much as digits as its factorization.

105556663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 105556663 is about 10274.0772335037. The cubic root of 105556663 is about 472.6016324401.

The spelling of 105556663 in words is "one hundred five million, five hundred fifty-six thousand, six hundred sixty-three".