8020785877 has 8 divisors (see below), whose sum is σ = 8643591320. Its totient is φ = 7398812160.

The previous prime is 8020785841. The next prime is 8020785881. The reversal of 8020785877 is 7785870208.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 844832356 + 7175953521 = 29066^2 + 84711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8020785877 - 2⁷ = 8020785749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8020785887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187824 + ... + 226537.

It is an arithmetic number, because the mean of its divisors is an integer number (1080448915).

Almost surely, 2^8020785877 is an apocalyptic number.

It is an amenable number.

8020785877 is a deficient number, since it is larger than the sum of its proper divisors (622805443).

8020785877 is a wasteful number, since it uses less digits than its factorization.

8020785877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415863.

The product of its (nonzero) digits is 1756160, while the sum is 52.

The square root of 8020785877 is about 89558.8403062478. The cubic root of 8020785877 is about 2001.7306583955.

The spelling of 8020785877 in words is "eight billion, twenty million, seven hundred eighty-five thousand, eight hundred seventy-seven".