4211665687 has 2 divisors, whose sum is σ = 4211665688. Its totient is φ = 4211665686.

The previous prime is 4211665681. The next prime is 4211665691. The reversal of 4211665687 is 7865661124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4211665687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4211665681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2105832843 + 2105832844.

It is an arithmetic number, because the mean of its divisors is an integer number (2105832844).

Almost surely, 2^4211665687 is an apocalyptic number.

4211665687 is a deficient number, since it is larger than the sum of its proper divisors (1).

4211665687 is an equidigital number, since it uses as much as digits as its factorization.

4211665687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 46.

The square root of 4211665687 is about 64897.3473032604. The cubic root of 4211665687 is about 1614.9210550988.

The spelling of 4211665687 in words is "four billion, two hundred eleven million, six hundred sixty-five thousand, six hundred eighty-seven".