66025699 has 2 divisors, whose sum is σ = 66025700. Its totient is φ = 66025698.

The previous prime is 66025697. The next prime is 66025717. The reversal of 66025699 is 99652066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66025699 - 2¹ = 66025697 is a prime.

Together with 66025697, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66025697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33012849 + 33012850.

It is an arithmetic number, because the mean of its divisors is an integer number (33012850).

Almost surely, 2^66025699 is an apocalyptic number.

66025699 is a deficient number, since it is larger than the sum of its proper divisors (1).

66025699 is an equidigital number, since it uses as much as digits as its factorization.

66025699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 66025699 is about 8125.6199148127. The cubic root of 66025699 is about 404.1764476938.

The spelling of 66025699 in words is "sixty-six million, twenty-five thousand, six hundred ninety-nine".