68106667 has 4 divisors (see below), whose sum is σ = 68129056. Its totient is φ = 68084280.

The previous prime is 68106637. The next prime is 68106691. The reversal of 68106667 is 76660186.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68106667 - 2¹⁹ = 67582379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68106637) 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, 5748 + ... + 13009.

It is an arithmetic number, because the mean of its divisors is an integer number (17032264).

Almost surely, 2^68106667 is an apocalyptic number.

68106667 is a deficient number, since it is larger than the sum of its proper divisors (22389).

68106667 is a wasteful number, since it uses less digits than its factorization.

68106667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22388.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 68106667 is about 8252.6763537655. The cubic root of 68106667 is about 408.3788192376.

The spelling of 68106667 in words is "sixty-eight million, one hundred six thousand, six hundred sixty-seven".