2766660641 has 2 divisors, whose sum is σ = 2766660642. Its totient is φ = 2766660640.

The previous prime is 2766660599. The next prime is 2766660671. The reversal of 2766660641 is 1460666672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2592948241 + 173712400 = 50921^2 + 13180^2 .

It is a cyclic number.

It is not a de Polignac number, because 2766660641 - 2¹⁰ = 2766659617 is a prime.

It is a super-2 number, since 2×2766660641² = 15308822204917061762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2766660592 and 2766660601.

It is not a weakly prime, because it can be changed into another prime (2766660671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1383330320 + 1383330321.

It is an arithmetic number, because the mean of its divisors is an integer number (1383330321).

Almost surely, 2^2766660641 is an apocalyptic number.

It is an amenable number.

2766660641 is a deficient number, since it is larger than the sum of its proper divisors (1).

2766660641 is an equidigital number, since it uses as much as digits as its factorization.

2766660641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 2766660641 is about 52599.0555143341. The cubic root of 2766660641 is about 1403.8432902272.

The spelling of 2766660641 in words is "two billion, seven hundred sixty-six million, six hundred sixty thousand, six hundred forty-one".