2766645397 has 2 divisors, whose sum is σ = 2766645398. Its totient is φ = 2766645396.

The previous prime is 2766645389. The next prime is 2766645449. The reversal of 2766645397 is 7935466672.

2766645397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2753205841 + 13439556 = 52471^2 + 3666^2 .

It is a cyclic number.

It is not a de Polignac number, because 2766645397 - 2³ = 2766645389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2766645317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1383322698 + 1383322699.

It is an arithmetic number, because the mean of its divisors is an integer number (1383322699).

Almost surely, 2^2766645397 is an apocalyptic number.

It is an amenable number.

2766645397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2766645397 is an equidigital number, since it uses as much as digits as its factorization.

2766645397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11430720, while the sum is 55.

The square root of 2766645397 is about 52598.9106065896. The cubic root of 2766645397 is about 1403.8407118811.

The spelling of 2766645397 in words is "two billion, seven hundred sixty-six million, six hundred forty-five thousand, three hundred ninety-seven".