66525629 has 2 divisors, whose sum is σ = 66525630. Its totient is φ = 66525628.

The previous prime is 66525577. The next prime is 66525647. The reversal of 66525629 is 92652566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43533604 + 22992025 = 6598^2 + 4795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66525629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66525649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33262814 + 33262815.

It is an arithmetic number, because the mean of its divisors is an integer number (33262815).

Almost surely, 2^66525629 is an apocalyptic number.

It is an amenable number.

66525629 is a deficient number, since it is larger than the sum of its proper divisors (1).

66525629 is an equidigital number, since it uses as much as digits as its factorization.

66525629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 41.

The square root of 66525629 is about 8156.3244785872. The cubic root of 66525629 is about 405.1939913002.

The spelling of 66525629 in words is "sixty-six million, five hundred twenty-five thousand, six hundred twenty-nine".