2566440778 has 8 divisors (see below), whose sum is σ = 4199630400. Its totient is φ = 1166563980.

The previous prime is 2566440761. The next prime is 2566440791. The reversal of 2566440778 is 8770446652.

2566440778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×2566440778³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58328178 + ... + 58328221.

It is an arithmetic number, because the mean of its divisors is an integer number (524953800).

Almost surely, 2^2566440778 is an apocalyptic number.

2566440778 is a deficient number, since it is larger than the sum of its proper divisors (1633189622).

2566440778 is a wasteful number, since it uses less digits than its factorization.

2566440778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116656412.

The product of its (nonzero) digits is 2257920, while the sum is 49.

The square root of 2566440778 is about 50660.0511053828. The cubic root of 2566440778 is about 1369.1270439964.

It can be divided in two parts, 2566 and 440778, that added together give a palindrome (443344).

The spelling of 2566440778 in words is "two billion, five hundred sixty-six million, four hundred forty thousand, seven hundred seventy-eight".