67161081 has 16 divisors (see below), whose sum is σ = 100630656. Its totient is φ = 39532416.

The previous prime is 67161079. The next prime is 67161103. The reversal of 67161081 is 18016176.

It is a happy number.

It is not a de Polignac number, because 67161081 - 2¹ = 67161079 is a prime.

It is a super-2 number, since 2×67161081² = 9021221602177122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67161581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36540 + ... + 38333.

It is an arithmetic number, because the mean of its divisors is an integer number (6289416).

Almost surely, 2^67161081 is an apocalyptic number.

It is an amenable number.

67161081 is a deficient number, since it is larger than the sum of its proper divisors (33469575).

67161081 is a wasteful number, since it uses less digits than its factorization.

67161081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74912.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 67161081 is about 8195.1864530345. The cubic root of 67161081 is about 406.4800412006.

The spelling of 67161081 in words is "sixty-seven million, one hundred sixty-one thousand, eighty-one".