121605066 has 24 divisors (see below), whose sum is σ = 287430624. Its totient is φ = 36849960.

The previous prime is 121605059. The next prime is 121605089. The reversal of 121605066 is 660506121.

It is a happy number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 306886 + ... + 307281.

It is an arithmetic number, because the mean of its divisors is an integer number (11976276).

Almost surely, 2^121605066 is an apocalyptic number.

121605066 is an abundant number, since it is smaller than the sum of its proper divisors (165825558).

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

121605066 is a wasteful number, since it uses less digits than its factorization.

121605066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614186 (or 614183 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 121605066 is about 11027.4687031975. The cubic root of 121605066 is about 495.4318117530.

The spelling of 121605066 in words is "one hundred twenty-one million, six hundred five thousand, sixty-six".