2566756616 has 8 divisors (see below), whose sum is σ = 4812668670. Its totient is φ = 1283378304.

The previous prime is 2566756613. The next prime is 2566756639. The reversal of 2566756616 is 6166576652.

It can be written as a sum of positive squares in only one way, i.e., 2539152100 + 27604516 = 50390^2 + 5254^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (2566756613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160422281 + ... + 160422296.

Almost surely, 2^2566756616 is an apocalyptic number.

It is an amenable number.

2566756616 is a deficient number, since it is larger than the sum of its proper divisors (2245912054).

2566756616 is a wasteful number, since it uses less digits than its factorization.

2566756616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320844583 (or 320844579 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 50.

The square root of 2566756616 is about 50663.1682388695. The cubic root of 2566756616 is about 1369.1832053820.

The spelling of 2566756616 in words is "two billion, five hundred sixty-six million, seven hundred fifty-six thousand, six hundred sixteen".