68278567 has 8 divisors (see below), whose sum is σ = 78109056. Its totient is φ = 58467192.

The previous prime is 68278537. The next prime is 68278577. The reversal of 68278567 is 76587286.

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

It is not a de Polignac number, because 68278567 - 2⁷ = 68278439 is a prime.

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 68278567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68278537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3948 + ... + 12334.

It is an arithmetic number, because the mean of its divisors is an integer number (9763632).

Almost surely, 2^68278567 is an apocalyptic number.

68278567 is a deficient number, since it is larger than the sum of its proper divisors (9830489).

68278567 is a wasteful number, since it uses less digits than its factorization.

68278567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9557.

The product of its digits is 1128960, while the sum is 49.

The square root of 68278567 is about 8263.0845935401. The cubic root of 68278567 is about 408.7221108386.

The spelling of 68278567 in words is "sixty-eight million, two hundred seventy-eight thousand, five hundred sixty-seven".