67550121 has 12 divisors (see below), whose sum is σ = 98579572. Its totient is φ = 44568576.

The previous prime is 67550117. The next prime is 67550141. The reversal of 67550121 is 12105576.

It can be written as a sum of positive squares in 2 ways, for example, as 27405225 + 40144896 = 5235^2 + 6336^2 .

It is not a de Polignac number, because 67550121 - 2² = 67550117 is a prime.

It is a super-2 number, since 2×67550121² = 9126037694229282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67550141) 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 11 ways as a sum of consecutive naturals, for example, 37816 + ... + 39561.

Almost surely, 2^67550121 is an apocalyptic number.

It is an amenable number.

67550121 is a deficient number, since it is larger than the sum of its proper divisors (31029451).

67550121 is a wasteful number, since it uses less digits than its factorization.

67550121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77480 (or 77477 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 67550121 is about 8218.8880634791. Note that the first 3 decimals coincide. The cubic root of 67550121 is about 407.2633948341.

Adding to 67550121 its reverse (12105576), we get a palindrome (79655697).

The spelling of 67550121 in words is "sixty-seven million, five hundred fifty thousand, one hundred twenty-one".