7776906121 has 2 divisors, whose sum is σ = 7776906122. Its totient is φ = 7776906120.

The previous prime is 7776906107. The next prime is 7776906127. The reversal of 7776906121 is 1216096777.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6996486025 + 780420096 = 83645^2 + 27936^2 .

It is a cyclic number.

It is not a de Polignac number, because 7776906121 - 2²⁷ = 7642688393 is a prime.

It is a super-3 number, since 3×7776906121³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (7776906127) 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, 3888453060 + 3888453061.

It is an arithmetic number, because the mean of its divisors is an integer number (3888453061).

Almost surely, 2^7776906121 is an apocalyptic number.

It is an amenable number.

7776906121 is a deficient number, since it is larger than the sum of its proper divisors (1).

7776906121 is an equidigital number, since it uses as much as digits as its factorization.

7776906121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 222264, while the sum is 46.

The square root of 7776906121 is about 88186.7684009342. The cubic root of 7776906121 is about 1981.2332996818.

The spelling of 7776906121 in words is "seven billion, seven hundred seventy-six million, nine hundred six thousand, one hundred twenty-one".