67020385 has 8 divisors (see below), whose sum is σ = 80833896. Its totient is φ = 53343360.

The previous prime is 67020383. The next prime is 67020397. The reversal of 67020385 is 58302076.

It can be written as a sum of positive squares in 4 ways, for example, as 44675856 + 22344529 = 6684^2 + 4727^2 .

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

It is not a de Polignac number, because 67020385 - 2¹ = 67020383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67020383) 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, 33036 + ... + 35005.

It is an arithmetic number, because the mean of its divisors is an integer number (10104237).

Almost surely, 2^67020385 is an apocalyptic number.

It is an amenable number.

67020385 is a deficient number, since it is larger than the sum of its proper divisors (13813511).

67020385 is a wasteful number, since it uses less digits than its factorization.

67020385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68243.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 67020385 is about 8186.5978892334. The cubic root of 67020385 is about 406.1959972399.

The spelling of 67020385 in words is "sixty-seven million, twenty thousand, three hundred eighty-five".