68680205 has 24 divisors (see below), whose sum is σ = 92124312. Its totient is φ = 49104000.

The previous prime is 68680201. The next prime is 68680223. The reversal of 68680205 is 50208686.

68680205 = T₁₄₇₀ + T₁₄₇₁ + ... + T₁₅₃₀.

It can be written as a sum of positive squares in 4 ways, for example, as 8369449 + 60310756 = 2893^2 + 7766^2 .

It is not a de Polignac number, because 68680205 - 2² = 68680201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68680201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35975 + ... + 37835.

It is an arithmetic number, because the mean of its divisors is an integer number (3838513).

Almost surely, 2^68680205 is an apocalyptic number.

It is an amenable number.

68680205 is a deficient number, since it is larger than the sum of its proper divisors (23444107).

68680205 is a wasteful number, since it uses less digits than its factorization.

68680205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949 (or 1938 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 68680205 is about 8287.3521102943. The cubic root of 68680205 is about 409.5219592028.

The spelling of 68680205 in words is "sixty-eight million, six hundred eighty thousand, two hundred five".