56664353908 has 18 divisors (see below), whose sum is σ = 99244472978. Its totient is φ = 28308804720.

The previous prime is 56664353869. The next prime is 56664353929. The reversal of 56664353908 is 80935346665.

It can be written as a sum of positive squares in only one way, i.e., 55827293284 + 837060624 = 236278^2 + 28932^2 .

It is a super-2 number, since 2×56664353908² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23250466 + ... + 23252902.

Almost surely, 2^56664353908 is an apocalyptic number.

It is an amenable number.

56664353908 is a deficient number, since it is larger than the sum of its proper divisors (42580119070).

56664353908 is an equidigital number, since it uses as much as digits as its factorization.

56664353908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7263 (or 4850 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 55.

The spelling of 56664353908 in words is "fifty-six billion, six hundred sixty-four million, three hundred fifty-three thousand, nine hundred eight".