2001512131666 has 16 divisors (see below), whose sum is σ = 3053687978880. Its totient is φ = 983680940880.

The previous prime is 2001512131613. The next prime is 2001512131673. The reversal of 2001512131666 is 6661312151002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16138506 + ... + 16262053.

It is an arithmetic number, because the mean of its divisors is an integer number (190855498680).

Almost surely, 2^{2001512131666} is an apocalyptic number.

2001512131666 is a deficient number, since it is larger than the sum of its proper divisors (1052175847214).

2001512131666 is a wasteful number, since it uses less digits than its factorization.

2001512131666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32401089.

The product of its (nonzero) digits is 12960, while the sum is 34.

Adding to 2001512131666 its reverse (6661312151002), we get a palindrome (8662824282668).

The spelling of 2001512131666 in words is "two trillion, one billion, five hundred twelve million, one hundred thirty-one thousand, six hundred sixty-six".