68257567 has 16 divisors (see below), whose sum is σ = 85266432. Its totient is φ = 53285760.

The previous prime is 68257559. The next prime is 68257577. The reversal of 68257567 is 76575286.

It is a cyclic number.

It is not a de Polignac number, because 68257567 - 2³ = 68257559 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 (68257507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5563 + ... + 12940.

It is an arithmetic number, because the mean of its divisors is an integer number (5329152).

Almost surely, 2^68257567 is an apocalyptic number.

68257567 is a deficient number, since it is larger than the sum of its proper divisors (17008865).

68257567 is a wasteful number, since it uses less digits than its factorization.

68257567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18558.

The product of its digits is 705600, while the sum is 46.

The square root of 68257567 is about 8261.8137839097. The cubic root of 68257567 is about 408.6802038644.

The spelling of 68257567 in words is "sixty-eight million, two hundred fifty-seven thousand, five hundred sixty-seven".