67681617 has 8 divisors (see below), whose sum is σ = 94165824. Its totient is φ = 43159248.

The previous prime is 67681589. The next prime is 67681633. The reversal of 67681617 is 71618676.

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

It is not a de Polignac number, because 67681617 - 2¹⁰ = 67680593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67681217) 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 7 ways as a sum of consecutive naturals, for example, 490378 + ... + 490515.

It is an arithmetic number, because the mean of its divisors is an integer number (11770728).

Almost surely, 2^67681617 is an apocalyptic number.

It is an amenable number.

67681617 is a deficient number, since it is larger than the sum of its proper divisors (26484207).

67681617 is a wasteful number, since it uses less digits than its factorization.

67681617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980919.

The product of its digits is 84672, while the sum is 42.

The square root of 67681617 is about 8226.8837964323. The cubic root of 67681617 is about 407.5274890812.

It can be divided in two parts, 6768 and 1617, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 67681617 in words is "sixty-seven million, six hundred eighty-one thousand, six hundred seventeen".