66402103 has 2 divisors, whose sum is σ = 66402104. Its totient is φ = 66402102.

The previous prime is 66402073. The next prime is 66402139. The reversal of 66402103 is 30120466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66402103 - 2²⁵ = 32847671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66409103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33201051 + 33201052.

It is an arithmetic number, because the mean of its divisors is an integer number (33201052).

Almost surely, 2^66402103 is an apocalyptic number.

66402103 is a deficient number, since it is larger than the sum of its proper divisors (1).

66402103 is an equidigital number, since it uses as much as digits as its factorization.

66402103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 66402103 is about 8148.7485542260. The cubic root of 66402103 is about 404.9430453873.

Adding to 66402103 its reverse (30120466), we get a palindrome (96522569).

The spelling of 66402103 in words is "sixty-six million, four hundred two thousand, one hundred three".