67256161 has 16 divisors (see below), whose sum is σ = 78158080. Its totient is φ = 56687040.

The previous prime is 67256087. The next prime is 67256173. The reversal of 67256161 is 16165276.

It is a happy number.

It is a 11-Lehmer number, since φ(67256161) divides (67256161-1)¹¹.

It is a cyclic number.

It is not a de Polignac number, because 67256161 - 2¹¹ = 67254113 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (67251161) 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 15 ways as a sum of consecutive naturals, for example, 137860 + ... + 138346.

It is an arithmetic number, because the mean of its divisors is an integer number (4884880).

Almost surely, 2^67256161 is an apocalyptic number.

It is an amenable number.

67256161 is a deficient number, since it is larger than the sum of its proper divisors (10901919).

67256161 is a wasteful number, since it uses less digits than its factorization.

67256161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784.

The product of its digits is 15120, while the sum is 34.

The square root of 67256161 is about 8200.9853676250. The cubic root of 67256161 is about 406.6717688004.

The spelling of 67256161 in words is "sixty-seven million, two hundred fifty-six thousand, one hundred sixty-one".