2666443616 has 12 divisors (see below), whose sum is σ = 5249560932. Its totient is φ = 1333221792.

The previous prime is 2666443609. The next prime is 2666443643. The reversal of 2666443616 is 6163446662.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41663150 + ... + 41663213.

It is an arithmetic number, because the mean of its divisors is an integer number (437463411).

Almost surely, 2^2666443616 is an apocalyptic number.

It is an amenable number.

2666443616 is a deficient number, since it is larger than the sum of its proper divisors (2583117316).

2666443616 is an equidigital number, since it uses as much as digits as its factorization.

2666443616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83326373 (or 83326365 counting only the distinct ones).

The product of its digits is 746496, while the sum is 44.

The square root of 2666443616 is about 51637.6182254759. The cubic root of 2666443616 is about 1386.6838839496.

The spelling of 2666443616 in words is "two billion, six hundred sixty-six million, four hundred forty-three thousand, six hundred sixteen".