2166385896 has 48 divisors (see below), whose sum is σ = 6056568960. Its totient is φ = 698833440.

The previous prime is 2166385877. The next prime is 2166385933. The reversal of 2166385896 is 6985836612.

It is a happy number.

2166385896 is a `hidden beast` number, since 21 + 6 + 6 + 38 + 589 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 483070 + ... + 487533.

It is an arithmetic number, because the mean of its divisors is an integer number (126178520).

Almost surely, 2^2166385896 is an apocalyptic number.

It is an amenable number.

2166385896 is an abundant number, since it is smaller than the sum of its proper divisors (3890183064).

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

2166385896 is a wasteful number, since it uses less digits than its factorization.

2166385896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970646 (or 970639 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 2166385896 is about 46544.4507540910. The cubic root of 2166385896 is about 1293.9334491946.

The spelling of 2166385896 in words is "two billion, one hundred sixty-six million, three hundred eighty-five thousand, eight hundred ninety-six".