66603373 has 2 divisors, whose sum is σ = 66603374. Its totient is φ = 66603372.

The previous prime is 66603353. The next prime is 66603391. The reversal of 66603373 is 37330666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56280004 + 10323369 = 7502^2 + 3213^2 .

It is a cyclic number.

It is not a de Polignac number, because 66603373 - 2¹³ = 66595181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66603323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33301686 + 33301687.

It is an arithmetic number, because the mean of its divisors is an integer number (33301687).

Almost surely, 2^66603373 is an apocalyptic number.

It is an amenable number.

66603373 is a deficient number, since it is larger than the sum of its proper divisors (1).

66603373 is an equidigital number, since it uses as much as digits as its factorization.

66603373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 34.

The square root of 66603373 is about 8161.0889592015. The cubic root of 66603373 is about 405.3517707852.

The spelling of 66603373 in words is "sixty-six million, six hundred three thousand, three hundred seventy-three".