2551766306 has 4 divisors (see below), whose sum is σ = 3827649462. Its totient is φ = 1275883152.

The previous prime is 2551766299. The next prime is 2551766311. The reversal of 2551766306 is 6036671552.

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., 2548735225 + 3031081 = 50485^2 + 1741^2 .

It is a super-2 number, since 2×2551766306² = 13023022560873771272, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637941575 + ... + 637941578.

Almost surely, 2^2551766306 is an apocalyptic number.

2551766306 is a deficient number, since it is larger than the sum of its proper divisors (1275883156).

2551766306 is a wasteful number, since it uses less digits than its factorization.

2551766306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275883155.

The product of its (nonzero) digits is 226800, while the sum is 41.

The square root of 2551766306 is about 50515.0106997910. The cubic root of 2551766306 is about 1366.5125760701.

The spelling of 2551766306 in words is "two billion, five hundred fifty-one million, seven hundred sixty-six thousand, three hundred six".