68553305 has 8 divisors (see below), whose sum is σ = 82571400. Its totient is φ = 54637696.

The previous prime is 68553301. The next prime is 68553313. The reversal of 68553305 is 50335586.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1247689 + 67305616 = 1117^2 + 8204^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 68553305 - 2² = 68553301 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68553301) 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, 24140 + ... + 26829.

It is an arithmetic number, because the mean of its divisors is an integer number (10321425).

Almost surely, 2^68553305 is an apocalyptic number.

It is an amenable number.

68553305 is a deficient number, since it is larger than the sum of its proper divisors (14018095).

68553305 is a wasteful number, since it uses less digits than its factorization.

68553305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51243.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 68553305 is about 8279.6923252015. The cubic root of 68553305 is about 409.2695799487.

The spelling of 68553305 in words is "sixty-eight million, five hundred fifty-three thousand, three hundred five".