67250561 has 16 divisors (see below), whose sum is σ = 79626240. Its totient is φ = 55602960.

The previous prime is 67250549. The next prime is 67250569. The reversal of 67250561 is 16505276.

It is a happy number.

It is not a de Polignac number, because 67250561 - 2¹⁸ = 66988417 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67250569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21920 + ... + 24798.

It is an arithmetic number, because the mean of its divisors is an integer number (4976640).

Almost surely, 2^67250561 is an apocalyptic number.

It is an amenable number.

67250561 is a deficient number, since it is larger than the sum of its proper divisors (12375679).

67250561 is a wasteful number, since it uses less digits than its factorization.

67250561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 67250561 is about 8200.6439381307. The cubic root of 67250561 is about 406.6604814820.

The spelling of 67250561 in words is "sixty-seven million, two hundred fifty thousand, five hundred sixty-one".