656553066806 has 128 divisors (see below), whose sum is σ = 1238007214080. Its totient is φ = 254252224512.

The previous prime is 656553066787. The next prime is 656553066809. The reversal of 656553066806 is 608660355656.

656553066806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656553066809) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1405894985 + ... + 1405895451.

It is an arithmetic number, because the mean of its divisors is an integer number (9671931360).

Almost surely, 2^656553066806 is an apocalyptic number.

656553066806 is a deficient number, since it is larger than the sum of its proper divisors (581454147274).

656553066806 is a wasteful number, since it uses less digits than its factorization.

656553066806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198.

The product of its (nonzero) digits is 23328000, while the sum is 56.

The spelling of 656553066806 in words is "six hundred fifty-six billion, five hundred fifty-three million, sixty-six thousand, eight hundred six".