65554121 has 16 divisors (see below), whose sum is σ = 69968640. Its totient is φ = 61326720.

The previous prime is 65554109. The next prime is 65554127. The reversal of 65554121 is 12145556.

It is a happy number.

65554121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65554121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65554127) 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 15 ways as a sum of consecutive naturals, for example, 119570 + ... + 120116.

It is an arithmetic number, because the mean of its divisors is an integer number (4373040).

Almost surely, 2^65554121 is an apocalyptic number.

It is an amenable number.

65554121 is a deficient number, since it is larger than the sum of its proper divisors (4414519).

65554121 is a wasteful number, since it uses less digits than its factorization.

65554121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704.

The product of its digits is 6000, while the sum is 29.

The square root of 65554121 is about 8096.5499442664. The cubic root of 65554121 is about 403.2118924204.

Adding to 65554121 its reverse (12145556), we get a palindrome (77699677).

The spelling of 65554121 in words is "sixty-five million, five hundred fifty-four thousand, one hundred twenty-one".