106221666 has 32 divisors (see below), whose sum is σ = 226978560. Its totient is φ = 33040656.

The previous prime is 106221649. The next prime is 106221667. The reversal of 106221666 is 666122601.

It is a super-2 number, since 2×106221666² = 22566084655631112, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (106221667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 685 + ... + 14591.

It is an arithmetic number, because the mean of its divisors is an integer number (7093080).

Almost surely, 2^106221666 is an apocalyptic number.

106221666 is an abundant number, since it is smaller than the sum of its proper divisors (120756894).

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

106221666 is a wasteful number, since it uses less digits than its factorization.

106221666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13998.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 106221666 is about 10306.3895715231. The cubic root of 106221666 is about 473.5920130488.

The spelling of 106221666 in words is "one hundred six million, two hundred twenty-one thousand, six hundred sixty-six".