67416381 has 20 divisors (see below), whose sum is σ = 105089952. Its totient is φ = 42988968.

The previous prime is 67416379. The next prime is 67416383. The reversal of 67416381 is 18361476.

It is an interprime number because it is at equal distance from previous prime (67416379) and next prime (67416383).

It is not a de Polignac number, because 67416381 - 2¹ = 67416379 is a prime.

It is a super-2 number, since 2×67416381² = 9089936854274322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67416383) 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 19 ways as a sum of consecutive naturals, for example, 16231 + ... + 19956.

Almost surely, 2^67416381 is an apocalyptic number.

It is an amenable number.

67416381 is a deficient number, since it is larger than the sum of its proper divisors (37673571).

67416381 is a wasteful number, since it uses less digits than its factorization.

67416381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36222 (or 36213 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 67416381 is about 8210.7478952894. The cubic root of 67416381 is about 406.9944419873.

The spelling of 67416381 in words is "sixty-seven million, four hundred sixteen thousand, three hundred eighty-one".