2661216059 has 4 divisors (see below), whose sum is σ = 2752982160. Its totient is φ = 2569449960.

The previous prime is 2661216053. The next prime is 2661216071. The reversal of 2661216059 is 9506121662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2661216059 - 2⁴ = 2661216043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2661216053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45883007 + ... + 45883064.

It is an arithmetic number, because the mean of its divisors is an integer number (688245540).

Almost surely, 2^2661216059 is an apocalyptic number.

2661216059 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2661216059 is a deficient number, since it is larger than the sum of its proper divisors (91766101).

2661216059 is an equidigital number, since it uses as much as digits as its factorization.

2661216059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91766100.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 2661216059 is about 51586.9756721597. The cubic root of 2661216059 is about 1385.7770941762. Note that the first 3 decimals are identical.

The spelling of 2661216059 in words is "two billion, six hundred sixty-one million, two hundred sixteen thousand, fifty-nine".