68668215 has 32 divisors (see below), whose sum is σ = 136982016. Its totient is φ = 28536960.

The previous prime is 68668211. The next prime is 68668241. The reversal of 68668215 is 51286686.

It is not a de Polignac number, because 68668215 - 2² = 68668211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68668211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28572 + ... + 30881.

It is an arithmetic number, because the mean of its divisors is an integer number (4280688).

Almost surely, 2^68668215 is an apocalyptic number.

68668215 is a deficient number, since it is larger than the sum of its proper divisors (68313801).

68668215 is a wasteful number, since it uses less digits than its factorization.

68668215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59479.

The product of its digits is 138240, while the sum is 42.

The square root of 68668215 is about 8286.6286872286. The cubic root of 68668215 is about 409.4981267460.

The spelling of 68668215 in words is "sixty-eight million, six hundred sixty-eight thousand, two hundred fifteen".