66431003 has 2 divisors, whose sum is σ = 66431004. Its totient is φ = 66431002.

The previous prime is 66430997. The next prime is 66431009. The reversal of 66431003 is 30013466.

It is a balanced prime because it is at equal distance from previous prime (66430997) and next prime (66431009).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66431003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66431003.

It is not a weakly prime, because it can be changed into another prime (66431009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33215501 + 33215502.

It is an arithmetic number, because the mean of its divisors is an integer number (33215502).

Almost surely, 2^66431003 is an apocalyptic number.

66431003 is a deficient number, since it is larger than the sum of its proper divisors (1).

66431003 is an equidigital number, since it uses as much as digits as its factorization.

66431003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 66431003 is about 8150.5216397480. The cubic root of 66431003 is about 405.0017842730.

Adding to 66431003 its reverse (30013466), we get a palindrome (96444469).

The spelling of 66431003 in words is "sixty-six million, four hundred thirty-one thousand, three".