68275505 has 4 divisors (see below), whose sum is σ = 81930612. Its totient is φ = 54620400.

The previous prime is 68275499. The next prime is 68275511. The reversal of 68275505 is 50557286.

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

It is an interprime number because it is at equal distance from previous prime (68275499) and next prime (68275511).

It can be written as a sum of positive squares in 2 ways, for example, as 19722481 + 48553024 = 4441^2 + 6968^2 .

It is not a de Polignac number, because 68275505 - 2⁴ = 68275489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6827546 + ... + 6827555.

It is an arithmetic number, because the mean of its divisors is an integer number (20482653).

Almost surely, 2^68275505 is an apocalyptic number.

It is an amenable number.

68275505 is a deficient number, since it is larger than the sum of its proper divisors (13655107).

68275505 is a wasteful number, since it uses less digits than its factorization.

68275505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13655106.

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 68275505 is about 8262.8993095644. The cubic root of 68275505 is about 408.7160009378.

The spelling of 68275505 in words is "sixty-eight million, two hundred seventy-five thousand, five hundred five".