66424733 has 2 divisors, whose sum is σ = 66424734. Its totient is φ = 66424732.

The previous prime is 66424717. The next prime is 66424777. The reversal of 66424733 is 33742466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39664804 + 26759929 = 6298^2 + 5173^2 .

It is a cyclic number.

It is not a de Polignac number, because 66424733 - 2⁴ = 66424717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66424693 and 66424702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66424783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33212366 + 33212367.

It is an arithmetic number, because the mean of its divisors is an integer number (33212367).

Almost surely, 2^66424733 is an apocalyptic number.

It is an amenable number.

66424733 is a deficient number, since it is larger than the sum of its proper divisors (1).

66424733 is an equidigital number, since it uses as much as digits as its factorization.

66424733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 35.

The square root of 66424733 is about 8150.1369927137. The cubic root of 66424733 is about 404.9890420243.

The spelling of 66424733 in words is "sixty-six million, four hundred twenty-four thousand, seven hundred thirty-three".