66710473 has 2 divisors, whose sum is σ = 66710474. Its totient is φ = 66710472.

The previous prime is 66710471. The next prime is 66710551. The reversal of 66710473 is 37401766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60964864 + 5745609 = 7808^2 + 2397^2 .

It is a cyclic number.

It is not a de Polignac number, because 66710473 - 2¹ = 66710471 is a prime.

Together with 66710471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66710471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33355236 + 33355237.

It is an arithmetic number, because the mean of its divisors is an integer number (33355237).

Almost surely, 2^66710473 is an apocalyptic number.

It is an amenable number.

66710473 is a deficient number, since it is larger than the sum of its proper divisors (1).

66710473 is an equidigital number, since it uses as much as digits as its factorization.

66710473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 66710473 is about 8167.6479478489. The cubic root of 66710473 is about 405.5689265818.

The spelling of 66710473 in words is "sixty-six million, seven hundred ten thousand, four hundred seventy-three".