2551716766 has 16 divisors (see below), whose sum is σ = 3961990656. Its totient is φ = 1231596576.

The previous prime is 2551716737. The next prime is 2551716787. The reversal of 2551716766 is 6676171552.

It is a happy number.

It is a super-2 number, since 2×2551716766² = 13022516907770997512, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126361 + ... + 145156.

It is an arithmetic number, because the mean of its divisors is an integer number (247624416).

Almost surely, 2^2551716766 is an apocalyptic number.

2551716766 is a deficient number, since it is larger than the sum of its proper divisors (1410273890).

2551716766 is a wasteful number, since it uses less digits than its factorization.

2551716766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271683.

The product of its digits is 529200, while the sum is 46.

The square root of 2551716766 is about 50514.5203481138. The cubic root of 2551716766 is about 1366.5037328529.

The spelling of 2551716766 in words is "two billion, five hundred fifty-one million, seven hundred sixteen thousand, seven hundred sixty-six".