7748668349 has 2 divisors, whose sum is σ = 7748668350. Its totient is φ = 7748668348.

The previous prime is 7748668337. The next prime is 7748668373. The reversal of 7748668349 is 9438668477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6221265625 + 1527402724 = 78875^2 + 39082^2 .

It is a cyclic number.

It is not a de Polignac number, because 7748668349 - 2⁸ = 7748668093 is a prime.

It is a super-2 number, since 2×7748668349² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7748668291 and 7748668300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7748668379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3874334174 + 3874334175.

It is an arithmetic number, because the mean of its divisors is an integer number (3874334175).

Almost surely, 2^7748668349 is an apocalyptic number.

It is an amenable number.

7748668349 is a deficient number, since it is larger than the sum of its proper divisors (1).

7748668349 is an equidigital number, since it uses as much as digits as its factorization.

7748668349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48771072, while the sum is 62.

The square root of 7748668349 is about 88026.5207139303. The cubic root of 7748668349 is about 1978.8324536097.

The spelling of 7748668349 in words is "seven billion, seven hundred forty-eight million, six hundred sixty-eight thousand, three hundred forty-nine".