66973019 has 2 divisors, whose sum is σ = 66973020. Its totient is φ = 66973018.

The previous prime is 66973009. The next prime is 66973031. The reversal of 66973019 is 91037966.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66973019 is a prime.

It is a super-2 number, since 2×66973019² = 8970770547948722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66973009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33486509 + 33486510.

It is an arithmetic number, because the mean of its divisors is an integer number (33486510).

Almost surely, 2^66973019 is an apocalyptic number.

66973019 is a deficient number, since it is larger than the sum of its proper divisors (1).

66973019 is an equidigital number, since it uses as much as digits as its factorization.

66973019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 66973019 is about 8183.7044790242. The cubic root of 66973019 is about 406.1002830085.

The spelling of 66973019 in words is "sixty-six million, nine hundred seventy-three thousand, nineteen".