67636985 has 16 divisors (see below), whose sum is σ = 87906000. Its totient is φ = 49662720.

The previous prime is 67636939. The next prime is 67636991. The reversal of 67636985 is 58963676.

It can be written as a sum of positive squares in 8 ways, for example, as 43705321 + 23931664 = 6611^2 + 4892^2 .

It is not a de Polignac number, because 67636985 - 2¹² = 67632889 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

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, 8891 + ... + 14639.

It is an arithmetic number, because the mean of its divisors is an integer number (5494125).

Almost surely, 2^67636985 is an apocalyptic number.

67636985 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

67636985 is a deficient number, since it is larger than the sum of its proper divisors (20269015).

67636985 is a wasteful number, since it uses less digits than its factorization.

67636985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5948.

The product of its digits is 1632960, while the sum is 50.

The square root of 67636985 is about 8224.1707788688. The cubic root of 67636985 is about 407.4378893380.

The spelling of 67636985 in words is "sixty-seven million, six hundred thirty-six thousand, nine hundred eighty-five".