68557357 has 4 divisors (see below), whose sum is σ = 74789856. Its totient is φ = 62324860.

The previous prime is 68557343. The next prime is 68557367. The reversal of 68557357 is 75375586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68557357 - 2¹¹ = 68555309 is a prime.

It is a super-3 number, since 3×68557357³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68557327) 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, 3116233 + ... + 3116254.

It is an arithmetic number, because the mean of its divisors is an integer number (18697464).

Almost surely, 2^68557357 is an apocalyptic number.

It is an amenable number.

68557357 is a deficient number, since it is larger than the sum of its proper divisors (6232499).

68557357 is a wasteful number, since it uses less digits than its factorization.

68557357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6232498.

The product of its digits is 882000, while the sum is 46.

The square root of 68557357 is about 8279.9370166687. The cubic root of 68557357 is about 409.2776433950.

The spelling of 68557357 in words is "sixty-eight million, five hundred fifty-seven thousand, three hundred fifty-seven".