67481216 has 48 divisors (see below), whose sum is σ = 147801570. Its totient is φ = 30666240.

The previous prime is 67481213. The next prime is 67481257. The reversal of 67481216 is 61218476.

It can be written as a sum of positive squares in only one way, i.e., 34762816 + 32718400 = 5896^2 + 5720^2 .

It is not an unprimeable number, because it can be changed into a prime (67481213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13310 + ... + 17666.

Almost surely, 2^67481216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67481216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73900785).

67481216 is an abundant number, since it is smaller than the sum of its proper divisors (80320354).

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

67481216 is a wasteful number, since it uses less digits than its factorization.

67481216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4393 (or 4370 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 67481216 is about 8214.6951252009. The cubic root of 67481216 is about 407.1248703775.

The spelling of 67481216 in words is "sixty-seven million, four hundred eighty-one thousand, two hundred sixteen".