7866788061 has 16 divisors (see below), whose sum is σ = 11444086080. Its totient is φ = 4767131520.

The previous prime is 7866788023. The next prime is 7866788071. The reversal of 7866788061 is 1608876687.

It is not a de Polignac number, because 7866788061 - 2⁶ = 7866787997 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7866787992 and 7866788010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7866788011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 469911 + ... + 486363.

It is an arithmetic number, because the mean of its divisors is an integer number (715255380).

Almost surely, 2^7866788061 is an apocalyptic number.

It is an amenable number.

7866788061 is a deficient number, since it is larger than the sum of its proper divisors (3577298019).

7866788061 is a wasteful number, since it uses less digits than its factorization.

7866788061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30956.

The product of its (nonzero) digits is 5419008, while the sum is 57.

The square root of 7866788061 is about 88694.9156434573. The cubic root of 7866788061 is about 1988.8368126339.

The spelling of 7866788061 in words is "seven billion, eight hundred sixty-six million, seven hundred eighty-eight thousand, sixty-one".