66498629 has 2 divisors, whose sum is σ = 66498630. Its totient is φ = 66498628.

The previous prime is 66498617. The next prime is 66498631. The reversal of 66498629 is 92689466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38725729 + 27772900 = 6223^2 + 5270^2 .

It is a cyclic number.

It is not a de Polignac number, because 66498629 - 2²⁰ = 65450053 is a prime.

Together with 66498631, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66498659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33249314 + 33249315.

It is an arithmetic number, because the mean of its divisors is an integer number (33249315).

Almost surely, 2^66498629 is an apocalyptic number.

It is an amenable number.

66498629 is a deficient number, since it is larger than the sum of its proper divisors (1).

66498629 is an equidigital number, since it uses as much as digits as its factorization.

66498629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 50.

The square root of 66498629 is about 8154.6691533133. The cubic root of 66498629 is about 405.1391667245.

The spelling of 66498629 in words is "sixty-six million, four hundred ninety-eight thousand, six hundred twenty-nine".