2566986956 has 6 divisors (see below), whose sum is σ = 4492227180. Its totient is φ = 1283493476.

The previous prime is 2566986949. The next prime is 2566986959. The reversal of 2566986956 is 6596896652.

It is not an unprimeable number, because it can be changed into a prime (2566986959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320873366 + ... + 320873373.

It is an arithmetic number, because the mean of its divisors is an integer number (748704530).

Almost surely, 2^2566986956 is an apocalyptic number.

It is an amenable number.

2566986956 is a deficient number, since it is larger than the sum of its proper divisors (1925240224).

2566986956 is a wasteful number, since it uses less digits than its factorization.

2566986956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641746743 (or 641746741 counting only the distinct ones).

The product of its digits is 41990400, while the sum is 62.

The square root of 2566986956 is about 50665.4414369400. The cubic root of 2566986956 is about 1369.2241608591.

The spelling of 2566986956 in words is "two billion, five hundred sixty-six million, nine hundred eighty-six thousand, nine hundred fifty-six".