612666666216 has 128 divisors (see below), whose sum is σ = 1857066480000. Its totient is φ = 185606484480.

The previous prime is 612666666193. The next prime is 612666666221.

612666666216 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9302490 + ... + 9368118.

It is an arithmetic number, because the mean of its divisors is an integer number (14508331875).

Almost surely, 2^612666666216 is an apocalyptic number.

612666666216 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612666666216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (928533240000).

612666666216 is an abundant number, since it is smaller than the sum of its proper divisors (1244399813784).

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

612666666216 is a wasteful number, since it uses less digits than its factorization.

612666666216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69584 (or 69574 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 54.

The spelling of 612666666216 in words is "six hundred twelve billion, six hundred sixty-six million, six hundred sixty-six thousand, two hundred sixteen".