2887666691 has 16 divisors (see below), whose sum is σ = 3582050304. Its totient is φ = 2266748064.

The previous prime is 2887666687. The next prime is 2887666693. The reversal of 2887666691 is 1966667882.

It is not a de Polignac number, because 2887666691 - 2² = 2887666687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2887666691.

It is not an unprimeable number, because it can be changed into a prime (2887666693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113375 + ... + 136488.

It is an arithmetic number, because the mean of its divisors is an integer number (223878144).

Almost surely, 2^2887666691 is an apocalyptic number.

2887666691 is a deficient number, since it is larger than the sum of its proper divisors (694383613).

2887666691 is a wasteful number, since it uses less digits than its factorization.

2887666691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250010.

The product of its digits is 10450944, while the sum is 59.

The square root of 2887666691 is about 53737.0141615628. The cubic root of 2887666691 is about 1424.0186847575.

The spelling of 2887666691 in words is "two billion, eight hundred eighty-seven million, six hundred sixty-six thousand, six hundred ninety-one".