56601556066 has 16 divisors (see below), whose sum is σ = 98069006880. Its totient is φ = 24214569280.

The previous prime is 56601556019. The next prime is 56601556087. The reversal of 56601556066 is 66065510665.

It is a super-2 number, since 2×56601556066² (a number of 22 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 75670156 + ... + 75670903.

It is an arithmetic number, because the mean of its divisors is an integer number (6129312930).

Almost surely, 2^56601556066 is an apocalyptic number.

56601556066 is a deficient number, since it is larger than the sum of its proper divisors (41467450814).

56601556066 is a wasteful number, since it uses less digits than its factorization.

56601556066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151341089.

The product of its (nonzero) digits is 972000, while the sum is 46.

The spelling of 56601556066 in words is "fifty-six billion, six hundred one million, five hundred fifty-six thousand, sixty-six".