67281985 has 8 divisors (see below), whose sum is σ = 80965440. Its totient is φ = 53674224.

The previous prime is 67281961. The next prime is 67281989. The reversal of 67281985 is 58918276.

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

It is a cyclic number.

It is not a de Polignac number, because 67281985 - 2¹¹ = 67279937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67281989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16947 + ... + 20536.

It is an arithmetic number, because the mean of its divisors is an integer number (10120680).

Almost surely, 2^67281985 is an apocalyptic number.

It is an amenable number.

67281985 is a deficient number, since it is larger than the sum of its proper divisors (13683455).

67281985 is a wasteful number, since it uses less digits than its factorization.

67281985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37847.

The product of its digits is 241920, while the sum is 46.

The square root of 67281985 is about 8202.5596614715. The cubic root of 67281985 is about 406.7238113581.

The spelling of 67281985 in words is "sixty-seven million, two hundred eighty-one thousand, nine hundred eighty-five".