67012057 has 6 divisors (see below), whose sum is σ = 77952858. Its totient is φ = 57438864.

The previous prime is 67012027. The next prime is 67012073. The reversal of 67012057 is 75021076.

It can be written as a sum of positive squares in only one way, i.e., 64464841 + 2547216 = 8029^2 + 1596^2 .

It is not a de Polignac number, because 67012057 - 2⁷ = 67011929 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67012027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 683748 + ... + 683845.

It is an arithmetic number, because the mean of its divisors is an integer number (12992143).

Almost surely, 2^67012057 is an apocalyptic number.

It is an amenable number.

67012057 is a deficient number, since it is larger than the sum of its proper divisors (10940801).

67012057 is a wasteful number, since it uses less digits than its factorization.

67012057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367607 (or 1367600 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 67012057 is about 8186.0892372365. The cubic root of 67012057 is about 406.1791718099.

It can be divided in two parts, 670 and 12057, that multiplied together give a triangular number (8078190 = T₄₀₁₉).

The spelling of 67012057 in words is "sixty-seven million, twelve thousand, fifty-seven".