216665426562 has 32 divisors (see below), whose sum is σ = 468313032768. Its totient is φ = 66430708416.

The previous prime is 216665426561. The next prime is 216665426569. The reversal of 216665426562 is 265624566612.

It is not an unprimeable number, because it can be changed into a prime (216665426561) 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 15 ways as a sum of consecutive naturals, for example, 4885633 + ... + 4929780.

It is an arithmetic number, because the mean of its divisors is an integer number (14634782274).

Almost surely, 2^216665426562 is an apocalyptic number.

216665426562 is an abundant number, since it is smaller than the sum of its proper divisors (251647606206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216665426562 is a wasteful number, since it uses less digits than its factorization.

216665426562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9815714.

The product of its digits is 6220800, while the sum is 51.

The spelling of 216665426562 in words is "two hundred sixteen billion, six hundred sixty-five million, four hundred twenty-six thousand, five hundred sixty-two".