67297081 has 8 divisors (see below), whose sum is σ = 69913800. Its totient is φ = 64700160.

The previous prime is 67297073. The next prime is 67297093. The reversal of 67297081 is 18079276.

It can be written as a sum of positive squares in 4 ways, for example, as 39891856 + 27405225 = 6316^2 + 5235^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 67297081 - 2³ = 67297073 is a prime.

It is a super-2 number, since 2×67297081² = 9057794222241122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67292081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2175 + ... + 11803.

It is an arithmetic number, because the mean of its divisors is an integer number (8739225).

Almost surely, 2^67297081 is an apocalyptic number.

It is an amenable number.

67297081 is a deficient number, since it is larger than the sum of its proper divisors (2616719).

67297081 is a wasteful number, since it uses less digits than its factorization.

67297081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9899.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 67297081 is about 8203.4798104219. The cubic root of 67297081 is about 406.7542278384.

The spelling of 67297081 in words is "sixty-seven million, two hundred ninety-seven thousand, eighty-one".