66496724249 has 2 divisors, whose sum is σ = 66496724250. Its totient is φ = 66496724248.

The previous prime is 66496724171. The next prime is 66496724279. The reversal of 66496724249 is 94242769466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61718458624 + 4778265625 = 248432^2 + 69125^2 .

It is a cyclic number.

It is not a de Polignac number, because 66496724249 - 2²⁸ = 66228288793 is a prime.

It is a super-2 number, since 2×66496724249² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66496724279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33248362124 + 33248362125.

It is an arithmetic number, because the mean of its divisors is an integer number (33248362125).

Almost surely, 2^66496724249 is an apocalyptic number.

It is an amenable number.

66496724249 is a deficient number, since it is larger than the sum of its proper divisors (1).

66496724249 is an equidigital number, since it uses as much as digits as its factorization.

66496724249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31352832, while the sum is 59.

The spelling of 66496724249 in words is "sixty-six billion, four hundred ninety-six million, seven hundred twenty-four thousand, two hundred forty-nine".