121065666 has 16 divisors (see below), whose sum is σ = 242676000. Its totient is φ = 40264448.

The previous prime is 121065649. The next prime is 121065673. The reversal of 121065666 is 666560121.

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, 19776 + ... + 25163.

It is an arithmetic number, because the mean of its divisors is an integer number (15167250).

Almost surely, 2^121065666 is an apocalyptic number.

121065666 is an abundant number, since it is smaller than the sum of its proper divisors (121610334).

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

121065666 is a wasteful number, since it uses less digits than its factorization.

121065666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45393.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 121065666 is about 11002.9844133308. The cubic root of 121065666 is about 494.6982019122.

The spelling of 121065666 in words is "one hundred twenty-one million, sixty-five thousand, six hundred sixty-six".