67056381 has 72 divisors (see below), whose sum is σ = 122603520. Its totient is φ = 34546176.

The previous prime is 67056373. The next prime is 67056383. The reversal of 67056381 is 18365076.

It is not a de Polignac number, because 67056381 - 2³ = 67056373 is a prime.

It is a super-2 number, since 2×67056381² = 8993116465634322, 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 (67056383) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 527940 + ... + 528066.

Almost surely, 2^67056381 is an apocalyptic number.

It is an amenable number.

67056381 is a deficient number, since it is larger than the sum of its proper divisors (55547139).

67056381 is a wasteful number, since it uses less digits than its factorization.

67056381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 67056381 is about 8188.7960653566. The cubic root of 67056381 is about 406.2687055371.

The spelling of 67056381 in words is "sixty-seven million, fifty-six thousand, three hundred eighty-one".