216661650106 has 16 divisors (see below), whose sum is σ = 357243641568. Its totient is φ = 97730791600.

The previous prime is 216661650103. The next prime is 216661650109. The reversal of 216661650106 is 601056166612.

It is an interprime number because it is at equal distance from previous prime (216661650103) and next prime (216661650109).

It is a super-2 number, since 2×216661650106² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216661650103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37585885 + ... + 37591648.

It is an arithmetic number, because the mean of its divisors is an integer number (22327727598).

Almost surely, 2^216661650106 is an apocalyptic number.

216661650106 is a deficient number, since it is larger than the sum of its proper divisors (140581991462).

216661650106 is a wasteful number, since it uses less digits than its factorization.

216661650106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75177677.

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 216661650106 in words is "two hundred sixteen billion, six hundred sixty-one million, six hundred fifty thousand, one hundred six".