121664808 has 32 divisors (see below), whose sum is σ = 337958400. Its totient is φ = 40554864.

The previous prime is 121664783. The next prime is 121664827. The reversal of 121664808 is 808466121.

121664808 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 648 + 0 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 281416 + ... + 281847.

It is an arithmetic number, because the mean of its divisors is an integer number (10561200).

Almost surely, 2^121664808 is an apocalyptic number.

121664808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

121664808 is an abundant number, since it is smaller than the sum of its proper divisors (216293592).

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

121664808 is a wasteful number, since it uses less digits than its factorization.

121664808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563278 (or 563268 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 121664808 is about 11030.1771517959. The cubic root of 121664808 is about 495.5129301982.

The spelling of 121664808 in words is "one hundred twenty-one million, six hundred sixty-four thousand, eight hundred eight".