2666571871 has 2 divisors, whose sum is σ = 2666571872. Its totient is φ = 2666571870.

The previous prime is 2666571851. The next prime is 2666571877. The reversal of 2666571871 is 1781756662.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2666571871 - 2¹¹ = 2666569823 is a prime.

It is a super-2 number, since 2×2666571871² = 14221211086416881282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2666571877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333285935 + 1333285936.

It is an arithmetic number, because the mean of its divisors is an integer number (1333285936).

Almost surely, 2^2666571871 is an apocalyptic number.

2666571871 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666571871 is an equidigital number, since it uses as much as digits as its factorization.

2666571871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 49.

The square root of 2666571871 is about 51638.8600861793. The cubic root of 2666571871 is about 1386.7061165955.

The spelling of 2666571871 in words is "two billion, six hundred sixty-six million, five hundred seventy-one thousand, eight hundred seventy-one".