2166571556006 has 32 divisors (see below), whose sum is σ = 3833989286400. Its totient is φ = 905247413280.

The previous prime is 2166571555943. The next prime is 2166571556011. The reversal of 2166571556006 is 6006551756612.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15779816 + ... + 15916523.

It is an arithmetic number, because the mean of its divisors is an integer number (119812165200).

Almost surely, 2^{2166571556006} is an apocalyptic number.

2166571556006 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2166571556006 is a deficient number, since it is larger than the sum of its proper divisors (1667417730394).

2166571556006 is a wasteful number, since it uses less digits than its factorization.

2166571556006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31696604.

The product of its (nonzero) digits is 2268000, while the sum is 50.

The spelling of 2166571556006 in words is "two trillion, one hundred sixty-six billion, five hundred seventy-one million, five hundred fifty-six thousand, six".