66603629 has 2 divisors, whose sum is σ = 66603630. Its totient is φ = 66603628.

The previous prime is 66603623. The next prime is 66603661. The reversal of 66603629 is 92630666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47637604 + 18966025 = 6902^2 + 4355^2 .

It is a cyclic number.

It is not a de Polignac number, because 66603629 - 2⁴ = 66603613 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66603592 and 66603601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66603623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33301814 + 33301815.

It is an arithmetic number, because the mean of its divisors is an integer number (33301815).

Almost surely, 2^66603629 is an apocalyptic number.

It is an amenable number.

66603629 is a deficient number, since it is larger than the sum of its proper divisors (1).

66603629 is an equidigital number, since it uses as much as digits as its factorization.

66603629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 66603629 is about 8161.1046433678. The cubic root of 66603629 is about 405.3522901278.

The spelling of 66603629 in words is "sixty-six million, six hundred three thousand, six hundred twenty-nine".