67106161 has 4 divisors (see below), whose sum is σ = 68206324. Its totient is φ = 66006000.

The previous prime is 67106159. The next prime is 67106167. The reversal of 67106161 is 16160176.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14630625 + 52475536 = 3825^2 + 7244^2 .

It is a cyclic number.

It is not a de Polignac number, because 67106161 - 2¹ = 67106159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67106167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549990 + ... + 550111.

It is an arithmetic number, because the mean of its divisors is an integer number (17051581).

Almost surely, 2^67106161 is an apocalyptic number.

67106161 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

67106161 is the 3664-th centered decagonal number.

It is an amenable number.

67106161 is a deficient number, since it is larger than the sum of its proper divisors (1100163).

67106161 is a wasteful number, since it uses less digits than its factorization.

67106161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100162.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 67106161 is about 8191.8350203114. The cubic root of 67106161 is about 406.3692132661.

The spelling of 67106161 in words is "sixty-seven million, one hundred six thousand, one hundred sixty-one".