68557063 has 4 divisors (see below), whose sum is σ = 68824080. Its totient is φ = 68290048.

The previous prime is 68557061. The next prime is 68557079. The reversal of 68557063 is 36075586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36075586 = 2 ⋅18037793.

It is a cyclic number.

It is not a de Polignac number, because 68557063 - 2¹ = 68557061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68557061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133123 + ... + 133636.

It is an arithmetic number, because the mean of its divisors is an integer number (17206020).

Almost surely, 2^68557063 is an apocalyptic number.

68557063 is a deficient number, since it is larger than the sum of its proper divisors (267017).

68557063 is a wasteful number, since it uses less digits than its factorization.

68557063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267016.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 68557063 is about 8279.9192628914. The cubic root of 68557063 is about 409.2770583481.

The spelling of 68557063 in words is "sixty-eight million, five hundred fifty-seven thousand, sixty-three".