2100066666 has 32 divisors (see below), whose sum is σ = 4369809408. Its totient is φ = 672099120.

The previous prime is 2100066653. The next prime is 2100066671. The reversal of 2100066666 is 6666600012.

2100066666 is a modest number, since divided by 66666 gives 21000 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20830 + ... + 68073.

It is an arithmetic number, because the mean of its divisors is an integer number (136556544).

Almost surely, 2^2100066666 is an apocalyptic number.

2100066666 is an abundant number, since it is smaller than the sum of its proper divisors (2269742742).

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

2100066666 is a wasteful number, since it uses less digits than its factorization.

2100066666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89066.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 2100066666 is about 45826.4843294792. The cubic root of 2100066666 is about 1280.5927158109.

Adding to 2100066666 its reverse (6666600012), we get a palindrome (8766666678).

The spelling of 2100066666 in words is "two billion, one hundred million, sixty-six thousand, six hundred sixty-six".