68665567 has 8 divisors (see below), whose sum is σ = 72784656. Its totient is φ = 64555392.

The previous prime is 68665561. The next prime is 68665579. The reversal of 68665567 is 76556686.

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

It is not a de Polignac number, because 68665567 - 2³ = 68665559 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 68665567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68665561) 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, 20128 + ... + 23290.

It is an arithmetic number, because the mean of its divisors is an integer number (9098082).

Almost surely, 2^68665567 is an apocalyptic number.

68665567 is a deficient number, since it is larger than the sum of its proper divisors (4119089).

68665567 is a wasteful number, since it uses less digits than its factorization.

68665567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4457.

The product of its digits is 1814400, while the sum is 49.

The square root of 68665567 is about 8286.4689102174. The cubic root of 68665567 is about 409.4928629570.

The spelling of 68665567 in words is "sixty-eight million, six hundred sixty-five thousand, five hundred sixty-seven".