121307666 has 16 divisors (see below), whose sum is σ = 193440960. Its totient is φ = 56890800.

The previous prime is 121307653. The next prime is 121307701. The reversal of 121307666 is 666703121.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11966 + ... + 19641.

It is an arithmetic number, because the mean of its divisors is an integer number (12090060).

Almost surely, 2^121307666 is an apocalyptic number.

121307666 is a deficient number, since it is larger than the sum of its proper divisors (72133294).

121307666 is a wasteful number, since it uses less digits than its factorization.

121307666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31729.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 121307666 is about 11013.9759396868. The cubic root of 121307666 is about 495.0276024468.

The spelling of 121307666 in words is "one hundred twenty-one million, three hundred seven thousand, six hundred sixty-six".