67542220 has 12 divisors (see below), whose sum is σ = 141838704. Its totient is φ = 27016880.

The previous prime is 67542217. The next prime is 67542221. The reversal of 67542220 is 2224576.

It is not an unprimeable number, because it can be changed into a prime (67542221) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1688536 + ... + 1688575.

It is an arithmetic number, because the mean of its divisors is an integer number (11819892).

Almost surely, 2^67542220 is an apocalyptic number.

It is an amenable number.

67542220 is an abundant number, since it is smaller than the sum of its proper divisors (74296484).

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

67542220 is a wasteful number, since it uses less digits than its factorization.

67542220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3377120 (or 3377118 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 67542220 is about 8218.4073882961. The cubic root of 67542220 is about 407.2475156938.

Adding to 67542220 its reverse (2224576), we get a palindrome (69766796).

The spelling of 67542220 in words is "sixty-seven million, five hundred forty-two thousand, two hundred twenty".