68306506 has 8 divisors (see below), whose sum is σ = 104393124. Its totient is φ = 33508800.

The previous prime is 68306471. The next prime is 68306543. The reversal of 68306506 is 60560386.

It can be written as a sum of positive squares in 2 ways, for example, as 66275881 + 2030625 = 8141^2 + 1425^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322095 + ... + 322306.

Almost surely, 2^68306506 is an apocalyptic number.

68306506 is a deficient number, since it is larger than the sum of its proper divisors (36086618).

68306506 is a wasteful number, since it uses less digits than its factorization.

68306506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644456.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 68306506 is about 8264.7750120617. The cubic root of 68306506 is about 408.7778517558. Note that the first 3 decimals are identical.

The spelling of 68306506 in words is "sixty-eight million, three hundred six thousand, five hundred six".