121195666 has 8 divisors (see below), whose sum is σ = 181920060. Its totient is φ = 60555648.

The previous prime is 121195663. The next prime is 121195667. The reversal of 121195666 is 666591121.

It can be written as a sum of positive squares in 2 ways, for example, as 93412225 + 27783441 = 9665^2 + 5271^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (121195663) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 17371 + ... + 23326.

Almost surely, 2^121195666 is an apocalyptic number.

121195666 is a deficient number, since it is larger than the sum of its proper divisors (60724394).

121195666 is a wasteful number, since it uses less digits than its factorization.

121195666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42188.

The product of its digits is 19440, while the sum is 37.

The square root of 121195666 is about 11008.8903164670. The cubic root of 121195666 is about 494.8752071226.

The spelling of 121195666 in words is "one hundred twenty-one million, one hundred ninety-five thousand, six hundred sixty-six".