106556661 has 16 divisors (see below), whose sum is σ = 161222400. Its totient is φ = 69525504.

The previous prime is 106556657. The next prime is 106556669. The reversal of 106556661 is 166655601.

It is not a de Polignac number, because 106556661 - 2² = 106556657 is a prime.

It is a super-2 number, since 2×106556661² = 22708644006937842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106556669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40716 + ... + 43253.

It is an arithmetic number, because the mean of its divisors is an integer number (10076400).

Almost surely, 2^106556661 is an apocalyptic number.

It is an amenable number.

106556661 is a deficient number, since it is larger than the sum of its proper divisors (54665739).

106556661 is an equidigital number, since it uses as much as digits as its factorization.

106556661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84025 (or 84019 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 106556661 is about 10322.6285896568. The cubic root of 106556661 is about 474.0893518465.

The spelling of 106556661 in words is "one hundred six million, five hundred fifty-six thousand, six hundred sixty-one".