66927743 has 2 divisors, whose sum is σ = 66927744. Its totient is φ = 66927742.

The previous prime is 66927739. The next prime is 66927767. The reversal of 66927743 is 34772966.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66927743 - 2² = 66927739 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 66927694 and 66927703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66927713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33463871 + 33463872.

It is an arithmetic number, because the mean of its divisors is an integer number (33463872).

Almost surely, 2^66927743 is an apocalyptic number.

66927743 is a deficient number, since it is larger than the sum of its proper divisors (1).

66927743 is an equidigital number, since it uses as much as digits as its factorization.

66927743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 44.

The square root of 66927743 is about 8180.9377824306. The cubic root of 66927743 is about 406.0087499226.

The spelling of 66927743 in words is "sixty-six million, nine hundred twenty-seven thousand, seven hundred forty-three".