68180151667 has 4 divisors (see below), whose sum is σ = 68205680416. Its totient is φ = 68154622920.

The previous prime is 68180151659. The next prime is 68180151727. The reversal of 68180151667 is 76615108186.

It is a happy number.

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 68180151667 - 2³ = 68180151659 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 68180151667.

It is not an unprimeable number, because it can be changed into a prime (68180451667) 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, 12760368 + ... + 12765709.

It is an arithmetic number, because the mean of its divisors is an integer number (17051420104).

Almost surely, 2^68180151667 is an apocalyptic number.

68180151667 is a deficient number, since it is larger than the sum of its proper divisors (25528749).

68180151667 is a wasteful number, since it uses less digits than its factorization.

68180151667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25528748.

The product of its (nonzero) digits is 483840, while the sum is 49.

The spelling of 68180151667 in words is "sixty-eight billion, one hundred eighty million, one hundred fifty-one thousand, six hundred sixty-seven".