6650121216 has 88 divisors (see below), whose sum is σ = 17794554624. Its totient is φ = 2208010240.

The previous prime is 6650121187. The next prime is 6650121253. The reversal of 6650121216 is 6121210566.

It is a super-2 number, since 2×6650121216² = 88448224374986637312, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 803821 + ... + 812051.

It is an arithmetic number, because the mean of its divisors is an integer number (202210848).

Almost surely, 2^6650121216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6650121216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8897277312).

6650121216 is an abundant number, since it is smaller than the sum of its proper divisors (11144433408).

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

6650121216 is a wasteful number, since it uses less digits than its factorization.

6650121216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8517 (or 8499 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 6650121216 is about 81548.2753710954. The cubic root of 6650121216 is about 1880.5137814118.

The spelling of 6650121216 in words is "six billion, six hundred fifty million, one hundred twenty-one thousand, two hundred sixteen".