68167618 has 4 divisors (see below), whose sum is σ = 102251430. Its totient is φ = 34083808.

The previous prime is 68167613. The next prime is 68167633. The reversal of 68167618 is 81676186.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81676186 = 2 ⋅40838093.

It can be written as a sum of positive squares in only one way, i.e., 55756089 + 12411529 = 7467^2 + 3523^2 .

It is not an unprimeable number, because it can be changed into a prime (68167613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17041903 + ... + 17041906.

Almost surely, 2^68167618 is an apocalyptic number.

68167618 is a deficient number, since it is larger than the sum of its proper divisors (34083812).

68167618 is a wasteful number, since it uses less digits than its factorization.

68167618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34083811.

The product of its digits is 96768, while the sum is 43.

The square root of 68167618 is about 8256.3683299620. The cubic root of 68167618 is about 408.5006070004.

The spelling of 68167618 in words is "sixty-eight million, one hundred sixty-seven thousand, six hundred eighteen".