2162001520666 has 16 divisors (see below), whose sum is σ = 3558359544264. Its totient is φ = 979019555904.

The previous prime is 2162001520649. The next prime is 2162001520673. The reversal of 2162001520666 is 6660251002612.

It can be written as a sum of positive squares in 4 ways, for example, as 1432294336225 + 729707184441 = 1196785^2 + 854229^2 .

It is a super-3 number, since 3×2162001520666³ (a number of 38 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 784469421 + ... + 784472176.

Almost surely, 2^{2162001520666} is an apocalyptic number.

2162001520666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2162001520666 is a deficient number, since it is larger than the sum of its proper divisors (1396358023598).

2162001520666 is a wasteful number, since it uses less digits than its factorization.

2162001520666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568941665.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 2162001520666 in words is "two trillion, one hundred sixty-two billion, one million, five hundred twenty thousand, six hundred sixty-six".