655216565766 has 64 divisors (see below), whose sum is σ = 1503321914880. Its totient is φ = 186495217920.

The previous prime is 655216565713. The next prime is 655216565837. The reversal of 655216565766 is 667565612556.

655216565766 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16434136 + ... + 16473956.

It is an arithmetic number, because the mean of its divisors is an integer number (23489404920).

Almost surely, 2^655216565766 is an apocalyptic number.

655216565766 is an abundant number, since it is smaller than the sum of its proper divisors (848105349114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

655216565766 is a wasteful number, since it uses less digits than its factorization.

655216565766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41309.

The product of its digits is 68040000, while the sum is 60.

The spelling of 655216565766 in words is "six hundred fifty-five billion, two hundred sixteen million, five hundred sixty-five thousand, seven hundred sixty-six".