2664256249 has 2 divisors, whose sum is σ = 2664256250. Its totient is φ = 2664256248.

The previous prime is 2664256211. The next prime is 2664256261. The reversal of 2664256249 is 9426524662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2090318400 + 573937849 = 45720^2 + 23957^2 .

It is a cyclic number.

It is not a de Polignac number, because 2664256249 - 2⁷ = 2664256121 is a prime.

It is a super-2 number, since 2×2664256249² = 14196522720671100002, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2664256199 and 2664256208.

It is not a weakly prime, because it can be changed into another prime (2664256279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332128124 + 1332128125.

It is an arithmetic number, because the mean of its divisors is an integer number (1332128125).

Almost surely, 2^2664256249 is an apocalyptic number.

It is an amenable number.

2664256249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2664256249 is an equidigital number, since it uses as much as digits as its factorization.

2664256249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 46.

The square root of 2664256249 is about 51616.4339043293. The cubic root of 2664256249 is about 1386.3046001809.

The spelling of 2664256249 in words is "two billion, six hundred sixty-four million, two hundred fifty-six thousand, two hundred forty-nine".