121664186 has 16 divisors (see below), whose sum is σ = 208794240. Its totient is φ = 52085040.

The previous prime is 121664171. The next prime is 121664219. The reversal of 121664186 is 681466121.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 10220 + ... + 18648.

It is an arithmetic number, because the mean of its divisors is an integer number (13049640).

Almost surely, 2^121664186 is an apocalyptic number.

121664186 is a deficient number, since it is larger than the sum of its proper divisors (87130054).

121664186 is a wasteful number, since it uses less digits than its factorization.

121664186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9469.

The product of its digits is 13824, while the sum is 35.

The square root of 121664186 is about 11030.1489563831. The cubic root of 121664186 is about 495.5120857755.

The spelling of 121664186 in words is "one hundred twenty-one million, six hundred sixty-four thousand, one hundred eighty-six".