66213029 has 2 divisors, whose sum is σ = 66213030. Its totient is φ = 66213028.

The previous prime is 66212957. The next prime is 66213097. The reversal of 66213029 is 92031266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53949025 + 12264004 = 7345^2 + 3502^2 .

It is a cyclic number.

It is not a de Polignac number, because 66213029 - 2²⁰ = 65164453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66212992 and 66213010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66213529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33106514 + 33106515.

It is an arithmetic number, because the mean of its divisors is an integer number (33106515).

Almost surely, 2^66213029 is an apocalyptic number.

It is an amenable number.

66213029 is a deficient number, since it is larger than the sum of its proper divisors (1).

66213029 is an equidigital number, since it uses as much as digits as its factorization.

66213029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 66213029 is about 8137.1388706351. The cubic root of 66213029 is about 404.5583337443.

The spelling of 66213029 in words is "sixty-six million, two hundred thirteen thousand, twenty-nine".