7821166763 has 4 divisors (see below), whose sum is σ = 7821682200. Its totient is φ = 7820651328.

The previous prime is 7821166697. The next prime is 7821166781. The reversal of 7821166763 is 3676611287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3676611287 = 14197 ⋅258971.

It is a cyclic number.

It is not a de Polignac number, because 7821166763 - 2¹² = 7821162667 is a prime.

It is a super-2 number, since 2×7821166763² (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 (7821166363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234245 + ... + 265542.

It is an arithmetic number, because the mean of its divisors is an integer number (1955420550).

Almost surely, 2^7821166763 is an apocalyptic number.

7821166763 is a deficient number, since it is larger than the sum of its proper divisors (515437).

7821166763 is a wasteful number, since it uses less digits than its factorization.

7821166763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515436.

The product of its digits is 508032, while the sum is 47.

The square root of 7821166763 is about 88437.3606740952. The cubic root of 7821166763 is about 1984.9847840010.

The spelling of 7821166763 in words is "seven billion, eight hundred twenty-one million, one hundred sixty-six thousand, seven hundred sixty-three".