67420161 has 8 divisors (see below), whose sum is σ = 99881760. Its totient is φ = 44946756.

The previous prime is 67420159. The next prime is 67420201. The reversal of 67420161 is 16102476.

It is not a de Polignac number, because 67420161 - 2¹ = 67420159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2497043 = 67420161 / (6 + 7 + 4 + 2 + 0 + 1 + 6 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67420261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1248495 + ... + 1248548.

It is an arithmetic number, because the mean of its divisors is an integer number (12485220).

It is a Proth number, since it is equal to 4115 ⋅ 2¹⁴ + 1 and 4115 < 2¹⁴.

Almost surely, 2^67420161 is an apocalyptic number.

It is an amenable number.

67420161 is a deficient number, since it is larger than the sum of its proper divisors (32461599).

67420161 is a wasteful number, since it uses less digits than its factorization.

67420161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497052 (or 2497046 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 67420161 is about 8210.9780781585. The cubic root of 67420161 is about 407.0020484979.

The spelling of 67420161 in words is "sixty-seven million, four hundred twenty thousand, one hundred sixty-one".