68656667 has 8 divisors (see below), whose sum is σ = 69498000. Its totient is φ = 67820704.

The previous prime is 68656631. The next prime is 68656691. The reversal of 68656667 is 76665686.

68656667 is nontrivially palindromic in base 14.

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

It is a cyclic number.

It is not a de Polignac number, because 68656667 - 2⁶ = 68656603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68656067) 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, 28184 + ... + 30522.

It is an arithmetic number, because the mean of its divisors is an integer number (8687250).

Almost surely, 2^68656667 is an apocalyptic number.

68656667 is a deficient number, since it is larger than the sum of its proper divisors (841333).

68656667 is a wasteful number, since it uses less digits than its factorization.

68656667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2685.

The product of its digits is 2177280, while the sum is 50.

The square root of 68656667 is about 8285.9318727588. The cubic root of 68656667 is about 409.4751702273.

The spelling of 68656667 in words is "sixty-eight million, six hundred fifty-six thousand, six hundred sixty-seven".