66453913 has 2 divisors, whose sum is σ = 66453914. Its totient is φ = 66453912.

The previous prime is 66453889. The next prime is 66453917. The reversal of 66453913 is 31935466.

66453913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66389904 + 64009 = 8148^2 + 253^2 .

It is a cyclic number.

It is not a de Polignac number, because 66453913 - 2¹³ = 66445721 is a prime.

It is a super-2 number, since 2×66453913² = 8832245106023138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66453917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33226956 + 33226957.

It is an arithmetic number, because the mean of its divisors is an integer number (33226957).

Almost surely, 2^66453913 is an apocalyptic number.

It is an amenable number.

66453913 is a deficient number, since it is larger than the sum of its proper divisors (1).

66453913 is an equidigital number, since it uses as much as digits as its factorization.

66453913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 37.

The square root of 66453913 is about 8151.9269501143. The cubic root of 66453913 is about 405.0483364551.

The spelling of 66453913 in words is "sixty-six million, four hundred fifty-three thousand, nine hundred thirteen".