7766133181 has 2 divisors, whose sum is σ = 7766133182. Its totient is φ = 7766133180.

The previous prime is 7766133119. The next prime is 7766133187. The reversal of 7766133181 is 1813316677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7230951225 + 535181956 = 85035^2 + 23134^2 .

It is an emirp because it is prime and its reverse (1813316677) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7766133181 is a prime.

It is a super-2 number, since 2×7766133181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7766133187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3883066590 + 3883066591.

It is an arithmetic number, because the mean of its divisors is an integer number (3883066591).

Almost surely, 2^7766133181 is an apocalyptic number.

It is an amenable number.

7766133181 is a deficient number, since it is larger than the sum of its proper divisors (1).

7766133181 is an equidigital number, since it uses as much as digits as its factorization.

7766133181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 43.

The square root of 7766133181 is about 88125.6669818731. Note that the first 3 decimals coincide. The cubic root of 7766133181 is about 1980.3180440877.

The spelling of 7766133181 in words is "seven billion, seven hundred sixty-six million, one hundred thirty-three thousand, one hundred eighty-one".