67690081 has 16 divisors (see below), whose sum is σ = 73543680. Its totient is φ = 62116560.

The previous prime is 67690067. The next prime is 67690087. The reversal of 67690081 is 18009676.

It is not a de Polignac number, because 67690081 - 2⁷ = 67689953 is a prime.

It is a super-2 number, since 2×67690081² = 9163894131573122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67690081.

It is not an unprimeable number, because it can be changed into a prime (67690087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98766 + ... + 99448.

It is an arithmetic number, because the mean of its divisors is an integer number (4596480).

Almost surely, 2^67690081 is an apocalyptic number.

It is an amenable number.

67690081 is a deficient number, since it is larger than the sum of its proper divisors (5853599).

67690081 is a wasteful number, since it uses less digits than its factorization.

67690081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 67690081 is about 8227.3981914090. The cubic root of 67690081 is about 407.5444763077.

The spelling of 67690081 in words is "sixty-seven million, six hundred ninety thousand, eighty-one".