2765616666 has 16 divisors (see below), whose sum is σ = 5531838624. Its totient is φ = 921771344.

The previous prime is 2765616653. The next prime is 2765616673. The reversal of 2765616666 is 6666165672.

It is a Curzon number.

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, 52696 + ... + 91148.

It is an arithmetic number, because the mean of its divisors is an integer number (345739914).

Almost surely, 2^2765616666 is an apocalyptic number.

2765616666 is an abundant number, since it is smaller than the sum of its proper divisors (2766221958).

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

2765616666 is a wasteful number, since it uses less digits than its factorization.

2765616666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50445.

The product of its digits is 3265920, while the sum is 51.

The square root of 2765616666 is about 52589.1306830604. The cubic root of 2765616666 is about 1403.6666920500. Note that the first 4 decimals are identical.

The spelling of 2765616666 in words is "two billion, seven hundred sixty-five million, six hundred sixteen thousand, six hundred sixty-six".