66973433 has 2 divisors, whose sum is σ = 66973434. Its totient is φ = 66973432.

The previous prime is 66973411. The next prime is 66973451. The reversal of 66973433 is 33437966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55771024 + 11202409 = 7468^2 + 3347^2 .

It is a cyclic number.

It is not a de Polignac number, because 66973433 - 2¹⁴ = 66957049 is a prime.

It is not a weakly prime, because it can be changed into another prime (66978433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33486716 + 33486717.

It is an arithmetic number, because the mean of its divisors is an integer number (33486717).

Almost surely, 2^66973433 is an apocalyptic number.

It is an amenable number.

66973433 is a deficient number, since it is larger than the sum of its proper divisors (1).

66973433 is an equidigital number, since it uses as much as digits as its factorization.

66973433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 41.

The square root of 66973433 is about 8183.7297731536. The cubic root of 66973433 is about 406.1011197891.

The spelling of 66973433 in words is "sixty-six million, nine hundred seventy-three thousand, four hundred thirty-three".