66099433 has 2 divisors, whose sum is σ = 66099434. Its totient is φ = 66099432.

The previous prime is 66099431. The next prime is 66099469. The reversal of 66099433 is 33499066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58415449 + 7683984 = 7643^2 + 2772^2 .

It is a cyclic number.

It is not a de Polignac number, because 66099433 - 2¹ = 66099431 is a prime.

Together with 66099431, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66099431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33049716 + 33049717.

It is an arithmetic number, because the mean of its divisors is an integer number (33049717).

Almost surely, 2^66099433 is an apocalyptic number.

It is an amenable number.

66099433 is a deficient number, since it is larger than the sum of its proper divisors (1).

66099433 is an equidigital number, since it uses as much as digits as its factorization.

66099433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 40.

The square root of 66099433 is about 8130.1557795654. The cubic root of 66099433 is about 404.3268459979.

The spelling of 66099433 in words is "sixty-six million, ninety-nine thousand, four hundred thirty-three".