67012220 has 36 divisors (see below), whose sum is σ = 154687512. Its totient is φ = 24367200.

The previous prime is 67012213. The next prime is 67012229. The reversal of 67012220 is 2221076.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 67012192 and 67012201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67012229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11426 + ... + 16265.

Almost surely, 2^67012220 is an apocalyptic number.

It is an amenable number.

67012220 is an abundant number, since it is smaller than the sum of its proper divisors (87675292).

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

67012220 is a wasteful number, since it uses less digits than its factorization.

67012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27722 (or 27709 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 67012220 is about 8186.0991931444. The cubic root of 67012220 is about 406.1795011394.

Adding to 67012220 its reverse (2221076), we get a palindrome (69233296).

The spelling of 67012220 in words is "sixty-seven million, twelve thousand, two hundred twenty".