8206157077 has 4 divisors (see below), whose sum is σ = 8208071116. Its totient is φ = 8204243040.

The previous prime is 8206157059. The next prime is 8206157081. The reversal of 8206157077 is 7707516028.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6717277681 + 1488879396 = 81959^2 + 38586^2 .

It is a cyclic number.

It is not a de Polignac number, because 8206157077 - 2⁷ = 8206156949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8206155077) 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, 950574 + ... + 959167.

It is an arithmetic number, because the mean of its divisors is an integer number (2052017779).

Almost surely, 2^8206157077 is an apocalyptic number.

It is an amenable number.

8206157077 is a deficient number, since it is larger than the sum of its proper divisors (1914039).

8206157077 is a wasteful number, since it uses less digits than its factorization.

8206157077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914038.

The product of its (nonzero) digits is 164640, while the sum is 43.

The square root of 8206157077 is about 90587.8417725028. The cubic root of 8206157077 is about 2017.0342614874.

The spelling of 8206157077 in words is "eight billion, two hundred six million, one hundred fifty-seven thousand, seventy-seven".