56666171 has 8 divisors (see below), whose sum is σ = 59065344. Its totient is φ = 54302760.

The previous prime is 56666149. The next prime is 56666173. The reversal of 56666171 is 17166665.

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 56666171 - 2¹⁴ = 56649787 is a prime.

It is a super-2 number, since 2×56666171² = 6422109871602482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56666173) 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, 5681 + ... + 12066.

It is an arithmetic number, because the mean of its divisors is an integer number (7383168).

Almost surely, 2^56666171 is an apocalyptic number.

56666171 is a deficient number, since it is larger than the sum of its proper divisors (2399173).

56666171 is a wasteful number, since it uses less digits than its factorization.

56666171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17881.

The product of its digits is 45360, while the sum is 38.

The square root of 56666171 is about 7527.6936042854. The cubic root of 56666171 is about 384.0973309232.

The spelling of 56666171 in words is "fifty-six million, six hundred sixty-six thousand, one hundred seventy-one".