67777985 has 8 divisors (see below), whose sum is σ = 88727616. Its totient is φ = 49293040.

The previous prime is 67777981. The next prime is 67777991. The reversal of 67777985 is 58977776.

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

It is not a de Polignac number, because 67777985 - 2² = 67777981 is a prime.

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 67777985.

It is not an unprimeable number, because it can be changed into a prime (67777981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 616109 + ... + 616218.

It is an arithmetic number, because the mean of its divisors is an integer number (11090952).

Almost surely, 2^67777985 is an apocalyptic number.

It is an amenable number.

67777985 is a deficient number, since it is larger than the sum of its proper divisors (20949631).

67777985 is a wasteful number, since it uses less digits than its factorization.

67777985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232343.

The product of its digits is 5186160, while the sum is 56.

The square root of 67777985 is about 8232.7386087498. The cubic root of 67777985 is about 407.7208157489.

The spelling of 67777985 in words is "sixty-seven million, seven hundred seventy-seven thousand, nine hundred eighty-five".