56665622123 has 16 divisors (see below), whose sum is σ = 64699713792. Its totient is φ = 49125516000.

The previous prime is 56665622119. The next prime is 56665622149. The reversal of 56665622123 is 32122656665.

It is not a de Polignac number, because 56665622123 - 2² = 56665622119 is a prime.

It is a super-3 number, since 3×56665622123³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56665622423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254588 + ... + 422073.

It is an arithmetic number, because the mean of its divisors is an integer number (4043732112).

Almost surely, 2^56665622123 is an apocalyptic number.

56665622123 is a deficient number, since it is larger than the sum of its proper divisors (8034091669).

56665622123 is a wasteful number, since it uses less digits than its factorization.

56665622123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677026.

The product of its digits is 777600, while the sum is 44.

The spelling of 56665622123 in words is "fifty-six billion, six hundred sixty-five million, six hundred twenty-two thousand, one hundred twenty-three".