2766542666 has 4 divisors (see below), whose sum is σ = 4149814002. Its totient is φ = 1383271332.

The previous prime is 2766542663. The next prime is 2766542677. The reversal of 2766542666 is 6662456672.

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

It can be written as a sum of positive squares in only one way, i.e., 2733721225 + 32821441 = 52285^2 + 5729^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2766542663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 691635665 + ... + 691635668.

Almost surely, 2^2766542666 is an apocalyptic number.

2766542666 is a deficient number, since it is larger than the sum of its proper divisors (1383271336).

2766542666 is a wasteful number, since it uses less digits than its factorization.

2766542666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383271335.

The product of its digits is 4354560, while the sum is 50.

The square root of 2766542666 is about 52597.9340468806. The cubic root of 2766542666 is about 1403.8233358746.

The spelling of 2766542666 in words is "two billion, seven hundred sixty-six million, five hundred forty-two thousand, six hundred sixty-six".