2666302381 has 2 divisors, whose sum is σ = 2666302382. Its totient is φ = 2666302380.

The previous prime is 2666302361. The next prime is 2666302391. The reversal of 2666302381 is 1832036662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1597600900 + 1068701481 = 39970^2 + 32691^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2666302381 is a prime.

It is a super-2 number, since 2×2666302381² = 14218336773852538322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2666302381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2666302361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333151190 + 1333151191.

It is an arithmetic number, because the mean of its divisors is an integer number (1333151191).

Almost surely, 2^2666302381 is an apocalyptic number.

It is an amenable number.

2666302381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666302381 is an equidigital number, since it uses as much as digits as its factorization.

2666302381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 2666302381 is about 51636.2506481638. The cubic root of 2666302381 is about 1386.6594004322.

It can be divided in two parts, 266630 and 2381, that added together give a triangular number (269011 = T₇₃₃).

The spelling of 2666302381 in words is "two billion, six hundred sixty-six million, three hundred two thousand, three hundred eighty-one".