68075551 has 4 divisors (see below), whose sum is σ = 69091672. Its totient is φ = 67059432.

The previous prime is 68075543. The next prime is 68075587. The reversal of 68075551 is 15557086.

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

It is a cyclic number.

It is not a de Polignac number, because 68075551 - 2³ = 68075543 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 68075551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68075251) by changing a digit.

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, 507960 + ... + 508093.

It is an arithmetic number, because the mean of its divisors is an integer number (17272918).

Almost surely, 2^68075551 is an apocalyptic number.

68075551 is a deficient number, since it is larger than the sum of its proper divisors (1016121).

68075551 is a wasteful number, since it uses less digits than its factorization.

68075551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016120.

The product of its (nonzero) digits is 42000, while the sum is 37.

The square root of 68075551 is about 8250.7909317834. The cubic root of 68075551 is about 408.3166175396.

The spelling of 68075551 in words is "sixty-eight million, seventy-five thousand, five hundred fifty-one".