66733481 has 2 divisors, whose sum is σ = 66733482. Its totient is φ = 66733480.

The previous prime is 66733477. The next prime is 66733487. The reversal of 66733481 is 18433766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60528400 + 6205081 = 7780^2 + 2491^2 .

It is a cyclic number.

It is not a de Polignac number, because 66733481 - 2² = 66733477 is a prime.

It is a super-2 number, since 2×66733481² = 8906714972754722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66733487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33366740 + 33366741.

It is an arithmetic number, because the mean of its divisors is an integer number (33366741).

Almost surely, 2^66733481 is an apocalyptic number.

It is an amenable number.

66733481 is a deficient number, since it is larger than the sum of its proper divisors (1).

66733481 is an equidigital number, since it uses as much as digits as its factorization.

66733481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 66733481 is about 8169.0563102478. The cubic root of 66733481 is about 405.6155472341.

The spelling of 66733481 in words is "sixty-six million, seven hundred thirty-three thousand, four hundred eighty-one".