67550421 has 8 divisors (see below), whose sum is σ = 91983744. Its totient is φ = 44075360.

The previous prime is 67550393. The next prime is 67550423. The reversal of 67550421 is 12405576.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67550421 - 2⁵ = 67550389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67550423) 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 7 ways as a sum of consecutive naturals, for example, 239400 + ... + 239681.

It is an arithmetic number, because the mean of its divisors is an integer number (11497968).

Almost surely, 2^67550421 is an apocalyptic number.

It is an amenable number.

67550421 is a deficient number, since it is larger than the sum of its proper divisors (24433323).

67550421 is a wasteful number, since it uses less digits than its factorization.

67550421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479131.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 67550421 is about 8218.9063141029. The cubic root of 67550421 is about 407.2639977387.

Adding to 67550421 its reverse (12405576), we get a palindrome (79955997).

The spelling of 67550421 in words is "sixty-seven million, five hundred fifty thousand, four hundred twenty-one".