7866770761 has 4 divisors (see below), whose sum is σ = 8015200452. Its totient is φ = 7718341072.

The previous prime is 7866770741. The next prime is 7866770803. The reversal of 7866770761 is 1670776687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1670776687 = 1979 ⋅844253.

It can be written as a sum of positive squares in 2 ways, for example, as 3474395136 + 4392375625 = 58944^2 + 66275^2 .

It is a cyclic number.

It is not a de Polignac number, because 7866770761 - 2¹¹ = 7866768713 is a prime.

It is a super-2 number, since 2×7866770761² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7866770701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74214766 + ... + 74214871.

It is an arithmetic number, because the mean of its divisors is an integer number (2003800113).

Almost surely, 2^7866770761 is an apocalyptic number.

It is an amenable number.

7866770761 is a deficient number, since it is larger than the sum of its proper divisors (148429691).

7866770761 is a wasteful number, since it uses less digits than its factorization.

7866770761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148429690.

The product of its (nonzero) digits is 4148928, while the sum is 55.

The square root of 7866770761 is about 88694.8181180840. The cubic root of 7866770761 is about 1988.8353547368.

The spelling of 7866770761 in words is "seven billion, eight hundred sixty-six million, seven hundred seventy thousand, seven hundred sixty-one".