121788664 has 16 divisors (see below), whose sum is σ = 229312800. Its totient is φ = 60638592.

The previous prime is 121788659. The next prime is 121788707. The reversal of 121788664 is 466887121.

It is a self number, because there is not a number n which added to its sum of digits gives 121788664.

It is a congruent number.

It is an unprimeable number.

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, 29937 + ... + 33760.

It is an arithmetic number, because the mean of its divisors is an integer number (14332050).

Almost surely, 2^121788664 is an apocalyptic number.

It is an amenable number.

121788664 is a deficient number, since it is larger than the sum of its proper divisors (107524136).

121788664 is a wasteful number, since it uses less digits than its factorization.

121788664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63942 (or 63938 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 121788664 is about 11035.7901393602. The cubic root of 121788664 is about 495.6810188904.

The spelling of 121788664 in words is "one hundred twenty-one million, seven hundred eighty-eight thousand, six hundred sixty-four".