68656151 has 2 divisors, whose sum is σ = 68656152. Its totient is φ = 68656150.

The previous prime is 68656123. The next prime is 68656153. The reversal of 68656151 is 15165686.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68656151 is a prime.

Together with 68656153, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68656153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34328075 + 34328076.

It is an arithmetic number, because the mean of its divisors is an integer number (34328076).

Almost surely, 2^68656151 is an apocalyptic number.

68656151 is a deficient number, since it is larger than the sum of its proper divisors (1).

68656151 is an equidigital number, since it uses as much as digits as its factorization.

68656151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 38.

The square root of 68656151 is about 8285.9007355869. The cubic root of 68656151 is about 409.4741443997.

The spelling of 68656151 in words is "sixty-eight million, six hundred fifty-six thousand, one hundred fifty-one".