2666003971 has 16 divisors (see below), whose sum is σ = 2851234560. Its totient is φ = 2484034560.

The previous prime is 2666003953. The next prime is 2666003987. The reversal of 2666003971 is 1793006662.

It is not a de Polignac number, because 2666003971 - 2¹⁷ = 2665872899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2666003771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 979150 + ... + 981868.

It is an arithmetic number, because the mean of its divisors is an integer number (178202160).

Almost surely, 2^2666003971 is an apocalyptic number.

2666003971 is a deficient number, since it is larger than the sum of its proper divisors (185230589).

2666003971 is a wasteful number, since it uses less digits than its factorization.

2666003971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3294.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 2666003971 is about 51633.3610275372. The cubic root of 2666003971 is about 1386.6076673063.

The spelling of 2666003971 in words is "two billion, six hundred sixty-six million, three thousand, nine hundred seventy-one".