56676781 has 12 divisors (see below), whose sum is σ = 66074400. Its totient is φ = 48473880.

The previous prime is 56676779. The next prime is 56676787. The reversal of 56676781 is 18767665.

56676781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56676781 - 2¹ = 56676779 is a prime.

It is a super-2 number, since 2×56676781² = 6424515009043922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56676787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28386 + ... + 30316.

It is an arithmetic number, because the mean of its divisors is an integer number (5506200).

Almost surely, 2^56676781 is an apocalyptic number.

It is an amenable number.

56676781 is a deficient number, since it is larger than the sum of its proper divisors (9397619).

56676781 is a wasteful number, since it uses less digits than its factorization.

56676781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544 (or 2537 counting only the distinct ones).

The product of its digits is 423360, while the sum is 46.

The square root of 56676781 is about 7528.3983024279. The cubic root of 56676781 is about 384.1213018291.

The spelling of 56676781 in words is "fifty-six million, six hundred seventy-six thousand, seven hundred eighty-one".