68865506 has 4 divisors (see below), whose sum is σ = 103298262. Its totient is φ = 34432752.

The previous prime is 68865479. The next prime is 68865529. The reversal of 68865506 is 60556886.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 67980025 + 885481 = 8245^2 + 941^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17216375 + ... + 17216378.

Almost surely, 2^68865506 is an apocalyptic number.

68865506 is a deficient number, since it is larger than the sum of its proper divisors (34432756).

68865506 is a wasteful number, since it uses less digits than its factorization.

68865506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34432755.

The product of its (nonzero) digits is 345600, while the sum is 44.

The square root of 68865506 is about 8298.5243266499. The cubic root of 68865506 is about 409.8899288104.

The spelling of 68865506 in words is "sixty-eight million, eight hundred sixty-five thousand, five hundred six".