121660166 has 8 divisors (see below), whose sum is σ = 182812680. Its totient is φ = 60722608.

The previous prime is 121660163. The next prime is 121660193. The reversal of 121660166 is 661066121.

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

It is a super-2 number, since 2×121660166² = 29602391982295112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121660163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52316 + ... + 54591.

It is an arithmetic number, because the mean of its divisors is an integer number (22851585).

Almost surely, 2^121660166 is an apocalyptic number.

121660166 is a deficient number, since it is larger than the sum of its proper divisors (61152514).

121660166 is a wasteful number, since it uses less digits than its factorization.

121660166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107478.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 121660166 is about 11029.9667270577. The cubic root of 121660166 is about 495.5066281833.

The spelling of 121660166 in words is "one hundred twenty-one million, six hundred sixty thousand, one hundred sixty-six".