7748660668477 has 2 divisors, whose sum is σ = 7748660668478. Its totient is φ = 7748660668476.

The previous prime is 7748660668439. The next prime is 7748660668481.

7748660668477 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7380382822596 + 368277845881 = 2716686^2 + 606859^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 7748660668477 - 2³¹ = 7746513184829 is a prime.

It is a super-3 number, since 3×7748660668477³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7748660668417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3874330334238 + 3874330334239.

It is an arithmetic number, because the mean of its divisors is an integer number (3874330334239).

Almost surely, 2^{7748660668477} is an apocalyptic number.

It is an amenable number.

7748660668477 is a deficient number, since it is larger than the sum of its proper divisors (1).

7748660668477 is an equidigital number, since it uses as much as digits as its factorization.

7748660668477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3186376704, while the sum is 76.

The spelling of 7748660668477 in words is "seven trillion, seven hundred forty-eight billion, six hundred sixty million, six hundred sixty-eight thousand, four hundred seventy-seven".