66487829 has 2 divisors, whose sum is σ = 66487830. Its totient is φ = 66487828.

The previous prime is 66487801. The next prime is 66487873. The reversal of 66487829 is 92878466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56100100 + 10387729 = 7490^2 + 3223^2 .

It is a cyclic number.

It is not a de Polignac number, because 66487829 - 2⁸ = 66487573 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66487429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33243914 + 33243915.

It is an arithmetic number, because the mean of its divisors is an integer number (33243915).

Almost surely, 2^66487829 is an apocalyptic number.

It is an amenable number.

66487829 is a deficient number, since it is larger than the sum of its proper divisors (1).

66487829 is an equidigital number, since it uses as much as digits as its factorization.

66487829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 50.

The square root of 66487829 is about 8154.0069291116. The cubic root of 66487829 is about 405.1172327389.

The spelling of 66487829 in words is "sixty-six million, four hundred eighty-seven thousand, eight hundred twenty-nine".