68765557 has 8 divisors (see below), whose sum is σ = 80417216. Its totient is φ = 57570912.

The previous prime is 68765519. The next prime is 68765591. The reversal of 68765557 is 75556786.

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

It is not a de Polignac number, because 68765557 - 2⁷ = 68765429 is a prime.

It is the 8293-rd Hogben number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68765557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68769557) by changing a digit.

It is a nontrivial repunit in base 8292.

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 7 ways as a sum of consecutive naturals, for example, 113928 + ... + 114529.

It is an arithmetic number, because the mean of its divisors is an integer number (10052152).

Almost surely, 2^68765557 is an apocalyptic number.

It is an amenable number.

68765557 is a deficient number, since it is larger than the sum of its proper divisors (11651659).

68765557 is a wasteful number, since it uses less digits than its factorization.

68765557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228507.

The product of its digits is 1764000, while the sum is 49.

The square root of 68765557 is about 8292.5000452216. The cubic root of 68765557 is about 409.6915328027.

It can be divided in two parts, 68 and 765557, that added together give a square (765625 = 875²).

The spelling of 68765557 in words is "sixty-eight million, seven hundred sixty-five thousand, five hundred fifty-seven".