7751920669 has 2 divisors, whose sum is σ = 7751920670. Its totient is φ = 7751920668.

The previous prime is 7751920633. The next prime is 7751920691. The reversal of 7751920669 is 9660291577.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7662901444 + 89019225 = 87538^2 + 9435^2 .

It is an emirp because it is prime and its reverse (9660291577) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7751920669 - 2⁹ = 7751920157 is a prime.

It is a super-4 number, since 4×7751920669⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7751920769) 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, 3875960334 + 3875960335.

It is an arithmetic number, because the mean of its divisors is an integer number (3875960335).

Almost surely, 2^7751920669 is an apocalyptic number.

It is an amenable number.

7751920669 is a deficient number, since it is larger than the sum of its proper divisors (1).

7751920669 is an equidigital number, since it uses as much as digits as its factorization.

7751920669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1428840, while the sum is 52.

The square root of 7751920669 is about 88044.9922993920. The cubic root of 7751920669 is about 1979.1092709010.

The spelling of 7751920669 in words is "seven billion, seven hundred fifty-one million, nine hundred twenty thousand, six hundred sixty-nine".