66735913 has 2 divisors, whose sum is σ = 66735914. Its totient is φ = 66735912.

The previous prime is 66735887. The next prime is 66735919. The reversal of 66735913 is 31953766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34609689 + 32126224 = 5883^2 + 5668^2 .

It is a cyclic number.

It is not a de Polignac number, because 66735913 - 2⁵ = 66735881 is a prime.

It is not a weakly prime, because it can be changed into another prime (66735919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33367956 + 33367957.

It is an arithmetic number, because the mean of its divisors is an integer number (33367957).

Almost surely, 2^66735913 is an apocalyptic number.

It is an amenable number.

66735913 is a deficient number, since it is larger than the sum of its proper divisors (1).

66735913 is an equidigital number, since it uses as much as digits as its factorization.

66735913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 40.

The square root of 66735913 is about 8169.2051632947. The cubic root of 66735913 is about 405.6204745210.

The spelling of 66735913 in words is "sixty-six million, seven hundred thirty-five thousand, nine hundred thirteen".