66234673 has 2 divisors, whose sum is σ = 66234674. Its totient is φ = 66234672.

The previous prime is 66234671. The next prime is 66234697. The reversal of 66234673 is 37643266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63489024 + 2745649 = 7968^2 + 1657^2 .

66234673 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 66234673 - 2¹ = 66234671 is a prime.

Together with 66234671, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66234671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33117336 + 33117337.

It is an arithmetic number, because the mean of its divisors is an integer number (33117337).

Almost surely, 2^66234673 is an apocalyptic number.

It is an amenable number.

66234673 is a deficient number, since it is larger than the sum of its proper divisors (1).

66234673 is an equidigital number, since it uses as much as digits as its factorization.

66234673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 37.

The square root of 66234673 is about 8138.4687134620. The cubic root of 66234673 is about 404.6024101987.

The spelling of 66234673 in words is "sixty-six million, two hundred thirty-four thousand, six hundred seventy-three".