67216481 has 8 divisors (see below), whose sum is σ = 68304384. Its totient is φ = 66132640.

The previous prime is 67216459. The next prime is 67216489. The reversal of 67216481 is 18461276.

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 67216481 - 2¹⁴ = 67200097 is a prime.

It is a super-3 number, since 3×67216481³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67216489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60725 + ... + 61821.

It is an arithmetic number, because the mean of its divisors is an integer number (8538048).

Almost surely, 2^67216481 is an apocalyptic number.

It is an amenable number.

67216481 is a deficient number, since it is larger than the sum of its proper divisors (1087903).

67216481 is a wasteful number, since it uses less digits than its factorization.

67216481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031.

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

The square root of 67216481 is about 8198.5657892097. The cubic root of 67216481 is about 406.5917765734.

The spelling of 67216481 in words is "sixty-seven million, two hundred sixteen thousand, four hundred eighty-one".