121866648 has 16 divisors (see below), whose sum is σ = 304666680. Its totient is φ = 40622208.

The previous prime is 121866643. The next prime is 121866649. The reversal of 121866648 is 846668121.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121866643) 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, 2538865 + ... + 2538912.

Almost surely, 2^121866648 is an apocalyptic number.

It is an amenable number.

121866648 is an abundant number, since it is smaller than the sum of its proper divisors (182800032).

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

121866648 is a wasteful number, since it uses less digits than its factorization.

121866648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5077786 (or 5077782 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 121866648 is about 11039.3228053174. The cubic root of 121866648 is about 495.7867948569.

The spelling of 121866648 in words is "one hundred twenty-one million, eight hundred sixty-six thousand, six hundred forty-eight".