67161009 has 4 divisors (see below), whose sum is σ = 89548016. Its totient is φ = 44774004.

The previous prime is 67160983. The next prime is 67161019. The reversal of 67161009 is 90016176.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 67161009 - 2¹¹ = 67158961 is a prime.

It is a super-2 number, since 2×67161009² = 9021202259796162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67161019) 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, 11193499 + ... + 11193504.

It is an arithmetic number, because the mean of its divisors is an integer number (22387004).

Almost surely, 2^67161009 is an apocalyptic number.

It is an amenable number.

67161009 is a deficient number, since it is larger than the sum of its proper divisors (22387007).

67161009 is a wasteful number, since it uses less digits than its factorization.

67161009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22387006.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 67161009 is about 8195.1820602107. The cubic root of 67161009 is about 406.4798959449.

The spelling of 67161009 in words is "sixty-seven million, one hundred sixty-one thousand, nine".