68555785 has 8 divisors (see below), whose sum is σ = 82427976. Its totient is φ = 54737280.

The previous prime is 68555779. The next prime is 68555791. The reversal of 68555785 is 58755586.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (68555779) and next prime (68555791).

It can be written as a sum of positive squares in 4 ways, for example, as 5400976 + 63154809 = 2324^2 + 7947^2 .

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

It is not a de Polignac number, because 68555785 - 2²⁵ = 35001353 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10554 + ... + 15763.

It is an arithmetic number, because the mean of its divisors is an integer number (10303497).

Almost surely, 2^68555785 is an apocalyptic number.

It is an amenable number.

68555785 is a deficient number, since it is larger than the sum of its proper divisors (13872191).

68555785 is a wasteful number, since it uses less digits than its factorization.

68555785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26843.

The product of its digits is 1680000, while the sum is 49.

The square root of 68555785 is about 8279.8420878662. The cubic root of 68555785 is about 409.2745151658.

The spelling of 68555785 in words is "sixty-eight million, five hundred fifty-five thousand, seven hundred eighty-five".