68186663 has 2 divisors, whose sum is σ = 68186664. Its totient is φ = 68186662.

The previous prime is 68186653. The next prime is 68186669. The reversal of 68186663 is 36668186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68186663 - 2⁴ = 68186647 is a prime.

It is a super-2 number, since 2×68186663² = 9298842022151138, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68186669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34093331 + 34093332.

It is an arithmetic number, because the mean of its divisors is an integer number (34093332).

Almost surely, 2^68186663 is an apocalyptic number.

68186663 is a deficient number, since it is larger than the sum of its proper divisors (1).

68186663 is an equidigital number, since it uses as much as digits as its factorization.

68186663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 44.

The square root of 68186663 is about 8257.5216015461. The cubic root of 68186663 is about 408.5386464188.

The spelling of 68186663 in words is "sixty-eight million, one hundred eighty-six thousand, six hundred sixty-three".