67640212 has 12 divisors (see below), whose sum is σ = 125333460. Its totient is φ = 31830656.

The previous prime is 67640207. The next prime is 67640213. The reversal of 67640212 is 21204676.

It can be written as a sum of positive squares in 2 ways, for example, as 30625156 + 37015056 = 5534^2 + 6084^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67640213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497287 + ... + 497422.

It is an arithmetic number, because the mean of its divisors is an integer number (10444455).

Almost surely, 2^67640212 is an apocalyptic number.

It is an amenable number.

67640212 is a deficient number, since it is larger than the sum of its proper divisors (57693248).

67640212 is a wasteful number, since it uses less digits than its factorization.

67640212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994730 (or 994728 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 67640212 is about 8224.3669665209. The cubic root of 67640212 is about 407.4443689347. Note that the first 3 decimals are identical.

Adding to 67640212 its reverse (21204676), we get a palindrome (88844888).

The spelling of 67640212 in words is "sixty-seven million, six hundred forty thousand, two hundred twelve".