7867797761 has 16 divisors (see below), whose sum is σ = 8779939200. Its totient is φ = 7006549248.

The previous prime is 7867797733. The next prime is 7867797781. The reversal of 7867797761 is 1677977687.

It is a cyclic number.

It is not a de Polignac number, because 7867797761 - 2¹⁴ = 7867781377 is a prime.

It is a super-2 number, since 2×7867797761² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7867797781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253076 + ... + 282458.

It is an arithmetic number, because the mean of its divisors is an integer number (548746200).

Almost surely, 2^7867797761 is an apocalyptic number.

It is an amenable number.

7867797761 is a deficient number, since it is larger than the sum of its proper divisors (912141439).

7867797761 is a wasteful number, since it uses less digits than its factorization.

7867797761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30248.

The product of its digits is 43563744, while the sum is 65.

The square root of 7867797761 is about 88700.6074443687. The cubic root of 7867797761 is about 1988.9218978727.

It can be divided in two parts, 7 and 867797761, that added together give a palindrome (867797768).

The spelling of 7867797761 in words is "seven billion, eight hundred sixty-seven million, seven hundred ninety-seven thousand, seven hundred sixty-one".