66229699 has 2 divisors, whose sum is σ = 66229700. Its totient is φ = 66229698.

The previous prime is 66229697. The next prime is 66229703. The reversal of 66229699 is 99692266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66229699 - 2¹ = 66229697 is a prime.

Together with 66229697, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66229693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33114849 + 33114850.

It is an arithmetic number, because the mean of its divisors is an integer number (33114850).

Almost surely, 2^66229699 is an apocalyptic number.

66229699 is a deficient number, since it is larger than the sum of its proper divisors (1).

66229699 is an equidigital number, since it uses as much as digits as its factorization.

66229699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 629856, while the sum is 49.

The square root of 66229699 is about 8138.1631219827. The cubic root of 66229699 is about 404.5922818541.

The spelling of 66229699 in words is "sixty-six million, two hundred twenty-nine thousand, six hundred ninety-nine".