2159368666 has 32 divisors (see below), whose sum is σ = 4000808448. Its totient is φ = 851195520.

The previous prime is 2159368663. The next prime is 2159368667. The reversal of 2159368666 is 6668639512.

It is not an unprimeable number, because it can be changed into a prime (2159368663) 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, 30031 + ... + 72253.

It is an arithmetic number, because the mean of its divisors is an integer number (125025264).

Almost surely, 2^2159368666 is an apocalyptic number.

2159368666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2159368666 is a deficient number, since it is larger than the sum of its proper divisors (1841439782).

2159368666 is a wasteful number, since it uses less digits than its factorization.

2159368666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42526.

The product of its digits is 2799360, while the sum is 52.

The square root of 2159368666 is about 46469.0075857017. The cubic root of 2159368666 is about 1292.5348602774.

The spelling of 2159368666 in words is "two billion, one hundred fifty-nine million, three hundred sixty-eight thousand, six hundred sixty-six".