116531621666 has 16 divisors (see below), whose sum is σ = 177478112448. Its totient is φ = 57374276400.

The previous prime is 116531621663. The next prime is 116531621677. The reversal of 116531621666 is 666126135611.

It is not an unprimeable number, because it can be changed into a prime (116531621663) by changing a digit.

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, 390785 + ... + 621108.

It is an arithmetic number, because the mean of its divisors is an integer number (11092382028).

Almost surely, 2^116531621666 is an apocalyptic number.

116531621666 is a deficient number, since it is larger than the sum of its proper divisors (60946490782).

116531621666 is a wasteful number, since it uses less digits than its factorization.

116531621666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012777.

The product of its digits is 233280, while the sum is 44.

The spelling of 116531621666 in words is "one hundred sixteen billion, five hundred thirty-one million, six hundred twenty-one thousand, six hundred sixty-six".