2166887835 has 128 divisors (see below), whose sum is σ = 4521553920. Its totient is φ = 964224000.

The previous prime is 2166887797. The next prime is 2166887873. The reversal of 2166887835 is 5387886612.

It is an interprime number because it is at equal distance from previous prime (2166887797) and next prime (2166887873).

It is not a de Polignac number, because 2166887835 - 2¹⁷ = 2166756763 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6967330 + ... + 6967640.

It is an arithmetic number, because the mean of its divisors is an integer number (35324640).

Almost surely, 2^2166887835 is an apocalyptic number.

2166887835 is an abundant number, since it is smaller than the sum of its proper divisors (2354666085).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2166887835 is a wasteful number, since it uses less digits than its factorization.

2166887835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 500 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The square root of 2166887835 is about 46549.8424809365. The cubic root of 2166887835 is about 1294.0333737601.

The spelling of 2166887835 in words is "two billion, one hundred sixty-six million, eight hundred eighty-seven thousand, eight hundred thirty-five".