66652073 has 2 divisors, whose sum is σ = 66652074. Its totient is φ = 66652072.

The previous prime is 66652043. The next prime is 66652093. The reversal of 66652073 is 37025666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38477209 + 28174864 = 6203^2 + 5308^2 .

It is a cyclic number.

It is not a de Polignac number, because 66652073 - 2¹⁴ = 66635689 is a prime.

It is not a weakly prime, because it can be changed into another prime (66652043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33326036 + 33326037.

It is an arithmetic number, because the mean of its divisors is an integer number (33326037).

Almost surely, 2^66652073 is an apocalyptic number.

It is an amenable number.

66652073 is a deficient number, since it is larger than the sum of its proper divisors (1).

66652073 is an equidigital number, since it uses as much as digits as its factorization.

66652073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 66652073 is about 8164.0720844441. The cubic root of 66652073 is about 405.4505436695.

The spelling of 66652073 in words is "sixty-six million, six hundred fifty-two thousand, seventy-three".