68661727 has 2 divisors, whose sum is σ = 68661728. Its totient is φ = 68661726.

The previous prime is 68661713. The next prime is 68661731. The reversal of 68661727 is 72716686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68661727 - 2²³ = 60273119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68661737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34330863 + 34330864.

It is an arithmetic number, because the mean of its divisors is an integer number (34330864).

Almost surely, 2^68661727 is an apocalyptic number.

68661727 is a deficient number, since it is larger than the sum of its proper divisors (1).

68661727 is an equidigital number, since it uses as much as digits as its factorization.

68661727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 43.

The square root of 68661727 is about 8286.2372039425. The cubic root of 68661727 is about 409.4852294274.

The spelling of 68661727 in words is "sixty-eight million, six hundred sixty-one thousand, seven hundred twenty-seven".