206746797077 has 4 divisors (see below), whose sum is σ = 206751682860. Its totient is φ = 206741911296.

The previous prime is 206746797073. The next prime is 206746797079. The reversal of 206746797077 is 770797647602.

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 102127541476 + 104619255601 = 319574^2 + 323449^2 .

It is a cyclic number.

It is not a de Polignac number, because 206746797077 - 2² = 206746797073 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 (206746797073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2378858 + ... + 2464235.

It is an arithmetic number, because the mean of its divisors is an integer number (51687920715).

Almost surely, 2^206746797077 is an apocalyptic number.

It is an amenable number.

206746797077 is a deficient number, since it is larger than the sum of its proper divisors (4885783).

206746797077 is an equidigital number, since it uses as much as digits as its factorization.

206746797077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4885782.

The product of its (nonzero) digits is 43563744, while the sum is 62.

The spelling of 206746797077 in words is "two hundred six billion, seven hundred forty-six million, seven hundred ninety-seven thousand, seventy-seven".