56668 has 12 divisors (see below), whose sum is σ = 102592. Its totient is φ = 27360.

The previous prime is 56663. The next prime is 56671. The reversal of 56668 is 86665.

It is a super-2 number, since 2×56668² = 6422524448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a plaindrome in base 10 and base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56663) by changing a digit.

56668 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105 + ... + 352.

2⁵⁶⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

56668 is a deficient number, since it is larger than the sum of its proper divisors (45924).

56668 is a wasteful number, since it uses less digits than its factorization.

56668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 490 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 56668 is about 238.0504148285. The cubic root of 56668 is about 38.4101463350.

The spelling of 56668 in words is "fifty-six thousand, six hundred sixty-eight".