66373019 has 2 divisors, whose sum is σ = 66373020. Its totient is φ = 66373018.

The previous prime is 66372983. The next prime is 66373031. The reversal of 66373019 is 91037366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66373019 - 2²⁴ = 49595803 is a prime.

It is a super-2 number, since 2×66373019² = 8810755302348722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66373019.

It is not a weakly prime, because it can be changed into another prime (66373039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33186509 + 33186510.

It is an arithmetic number, because the mean of its divisors is an integer number (33186510).

Almost surely, 2^66373019 is an apocalyptic number.

66373019 is a deficient number, since it is larger than the sum of its proper divisors (1).

66373019 is an equidigital number, since it uses as much as digits as its factorization.

66373019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 66373019 is about 8146.9637902718. The cubic root of 66373019 is about 404.8839153150.

The spelling of 66373019 in words is "sixty-six million, three hundred seventy-three thousand, nineteen".