216220062661 has 8 divisors (see below), whose sum is σ = 223200262400. Its totient is φ = 209240197920.

The previous prime is 216220062613. The next prime is 216220062677. The reversal of 216220062661 is 166260022612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216220062661 - 2²⁵ = 216186508229 is a prime.

It is a super-2 number, since 2×216220062661² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216220066661) 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, 2363470 + ... + 2453248.

It is an arithmetic number, because the mean of its divisors is an integer number (27900032800).

Almost surely, 2^216220062661 is an apocalyptic number.

It is an amenable number.

216220062661 is a deficient number, since it is larger than the sum of its proper divisors (6980199739).

216220062661 is an equidigital number, since it uses as much as digits as its factorization.

216220062661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167499.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 216220062661 in words is "two hundred sixteen billion, two hundred twenty million, sixty-two thousand, six hundred sixty-one".