68776557 has 16 divisors (see below), whose sum is σ = 95945472. Its totient is φ = 43777280.

The previous prime is 68776549. The next prime is 68776559. The reversal of 68776557 is 75567786.

It is a cyclic number.

It is not a de Polignac number, because 68776557 - 2³ = 68776549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68776559) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 168 + ... + 11729.

It is an arithmetic number, because the mean of its divisors is an integer number (5996592).

Almost surely, 2^68776557 is an apocalyptic number.

It is an amenable number.

68776557 is a deficient number, since it is larger than the sum of its proper divisors (27168915).

68776557 is a wasteful number, since it uses less digits than its factorization.

68776557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11988.

The product of its digits is 2469600, while the sum is 51.

The square root of 68776557 is about 8293.1632686207. The cubic root of 68776557 is about 409.7133769098.

The spelling of 68776557 in words is "sixty-eight million, seven hundred seventy-six thousand, five hundred fifty-seven".