66747047 has 2 divisors, whose sum is σ = 66747048. Its totient is φ = 66747046.

The previous prime is 66747041. The next prime is 66747053. The reversal of 66747047 is 74074766.

It is a balanced prime because it is at equal distance from previous prime (66747041) and next prime (66747053).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66747047 is a prime.

It is a Chen prime.

It is equal to p_3937757 and since 66747047 and 3937757 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 66746995 and 66747013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66747041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33373523 + 33373524.

It is an arithmetic number, because the mean of its divisors is an integer number (33373524).

Almost surely, 2^66747047 is an apocalyptic number.

66747047 is a deficient number, since it is larger than the sum of its proper divisors (1).

66747047 is an equidigital number, since it uses as much as digits as its factorization.

66747047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 41.

The square root of 66747047 is about 8169.8865965202. The cubic root of 66747047 is about 405.6430307282.

The spelling of 66747047 in words is "sixty-six million, seven hundred forty-seven thousand, forty-seven".