66387047 has 2 divisors, whose sum is σ = 66387048. Its totient is φ = 66387046.

The previous prime is 66387037. The next prime is 66387067. The reversal of 66387047 is 74078366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66387047 - 2⁴ = 66387031 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66386995 and 66387013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66387037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33193523 + 33193524.

It is an arithmetic number, because the mean of its divisors is an integer number (33193524).

Almost surely, 2^66387047 is an apocalyptic number.

66387047 is a deficient number, since it is larger than the sum of its proper divisors (1).

66387047 is an equidigital number, since it uses as much as digits as its factorization.

66387047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 66387047 is about 8147.8246790171. The cubic root of 66387047 is about 404.9124375045.

The spelling of 66387047 in words is "sixty-six million, three hundred eighty-seven thousand, forty-seven".