101511665666 has 16 divisors (see below), whose sum is σ = 152686892160. Its totient is φ = 50616126960.

The previous prime is 101511665611. The next prime is 101511665669. The reversal of 101511665666 is 666566115101.

It is not an unprimeable number, because it can be changed into a prime (101511665669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2352215 + ... + 2394981.

It is an arithmetic number, because the mean of its divisors is an integer number (9542930760).

Almost surely, 2^101511665666 is an apocalyptic number.

101511665666 is a deficient number, since it is larger than the sum of its proper divisors (51175226494).

101511665666 is a wasteful number, since it uses less digits than its factorization.

101511665666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46009.

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 101511665666 in words is "one hundred one billion, five hundred eleven million, six hundred sixty-five thousand, six hundred sixty-six".