2666397733 has 2 divisors, whose sum is σ = 2666397734. Its totient is φ = 2666397732.

The previous prime is 2666397703. The next prime is 2666397739. The reversal of 2666397733 is 3377936662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2522349729 + 144048004 = 50223^2 + 12002^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666397733 - 2⁹ = 2666397221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2666397739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333198866 + 1333198867.

It is an arithmetic number, because the mean of its divisors is an integer number (1333198867).

Almost surely, 2^2666397733 is an apocalyptic number.

It is an amenable number.

2666397733 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666397733 is an equidigital number, since it uses as much as digits as its factorization.

2666397733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5143824, while the sum is 52.

The square root of 2666397733 is about 51637.1739447464. The cubic root of 2666397733 is about 1386.6759300866.

The spelling of 2666397733 in words is "two billion, six hundred sixty-six million, three hundred ninety-seven thousand, seven hundred thirty-three".