66012481 has 2 divisors, whose sum is σ = 66012482. Its totient is φ = 66012480.

The previous prime is 66012451. The next prime is 66012493. The reversal of 66012481 is 18421066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65044225 + 968256 = 8065^2 + 984^2 .

It is a cyclic number.

It is not a de Polignac number, because 66012481 - 2¹⁵ = 65979713 is a prime.

It is a super-2 number, since 2×66012481² = 8715295295550722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66012451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33006240 + 33006241.

It is an arithmetic number, because the mean of its divisors is an integer number (33006241).

Almost surely, 2^66012481 is an apocalyptic number.

It is an amenable number.

66012481 is a deficient number, since it is larger than the sum of its proper divisors (1).

66012481 is an equidigital number, since it uses as much as digits as its factorization.

66012481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 66012481 is about 8124.8065207733. The cubic root of 66012481 is about 404.1494745560.

The spelling of 66012481 in words is "sixty-six million, twelve thousand, four hundred eighty-one".