655712205766 has 4 divisors (see below), whose sum is σ = 983568308652. Its totient is φ = 327856102882.

The previous prime is 655712205761. The next prime is 655712205829. The reversal of 655712205766 is 667502217556.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655712205761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163928051440 + ... + 163928051443.

It is an arithmetic number, because the mean of its divisors is an integer number (245892077163).

Almost surely, 2^655712205766 is an apocalyptic number.

655712205766 is a deficient number, since it is larger than the sum of its proper divisors (327856102886).

655712205766 is a wasteful number, since it uses less digits than its factorization.

655712205766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327856102885.

The product of its (nonzero) digits is 5292000, while the sum is 52.

The spelling of 655712205766 in words is "six hundred fifty-five billion, seven hundred twelve million, two hundred five thousand, seven hundred sixty-six".