68218085 has 8 divisors (see below), whose sum is σ = 88158840. Its totient is φ = 50376384.

The previous prime is 68218061. The next prime is 68218097. The reversal of 68218085 is 58081286.

It can be written as a sum of positive squares in 4 ways, for example, as 3157729 + 65060356 = 1777^2 + 8066^2 .

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 68218085 - 2⁶ = 68218021 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524690 + ... + 524819.

It is an arithmetic number, because the mean of its divisors is an integer number (11019855).

Almost surely, 2^68218085 is an apocalyptic number.

68218085 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68218085 is a deficient number, since it is larger than the sum of its proper divisors (19940755).

68218085 is a wasteful number, since it uses less digits than its factorization.

68218085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049527.

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 68218085 is about 8259.4240113945. The cubic root of 68218085 is about 408.6013914847.

The spelling of 68218085 in words is "sixty-eight million, two hundred eighteen thousand, eighty-five".