67720206 has 16 divisors (see below), whose sum is σ = 135549648. Its totient is φ = 22555200.

The previous prime is 67720171. The next prime is 67720207. The reversal of 67720206 is 60202776.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67720207) 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, 5076 + ... + 12696.

It is an arithmetic number, because the mean of its divisors is an integer number (8471853).

Almost surely, 2^67720206 is an apocalyptic number.

67720206 is an abundant number, since it is smaller than the sum of its proper divisors (67829442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67720206 is a wasteful number, since it uses less digits than its factorization.

67720206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9107.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 67720206 is about 8229.2287609472. The cubic root of 67720206 is about 407.6049256198.

The spelling of 67720206 in words is "sixty-seven million, seven hundred twenty thousand, two hundred six".