56661012221169 has 8 divisors (see below), whose sum is σ = 76216582811232. Its totient is φ = 37439724889280.

The previous prime is 56661012221161. The next prime is 56661012221173. The reversal of 56661012221169 is 96112221016665.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56661012221169 - 2³ = 56661012221161 is a prime.

It is a super-2 number, since 2×56661012221169² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56661012221161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83570814147 + ... + 83570814824.

It is an arithmetic number, because the mean of its divisors is an integer number (9527072851404).

Almost surely, 2^{56661012221169} is an apocalyptic number.

It is an amenable number.

56661012221169 is a deficient number, since it is larger than the sum of its proper divisors (19555570590063).

56661012221169 is a wasteful number, since it uses less digits than its factorization.

56661012221169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167141629087.

The product of its (nonzero) digits is 466560, while the sum is 48.

The spelling of 56661012221169 in words is "fifty-six trillion, six hundred sixty-one billion, twelve million, two hundred twenty-one thousand, one hundred sixty-nine".