56687761 has 8 divisors (see below), whose sum is σ = 61516224. Its totient is φ = 51926160.

The previous prime is 56687759. The next prime is 56687783. The reversal of 56687761 is 16778665.

56687761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 56687761 - 2¹ = 56687759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56687711) 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 7 ways as a sum of consecutive naturals, for example, 14941 + ... + 18346.

It is an arithmetic number, because the mean of its divisors is an integer number (7689528).

Almost surely, 2^56687761 is an apocalyptic number.

It is an amenable number.

56687761 is a deficient number, since it is larger than the sum of its proper divisors (4828463).

56687761 is a wasteful number, since it uses less digits than its factorization.

56687761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33431.

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

The square root of 56687761 is about 7529.1275058934. The cubic root of 56687761 is about 384.1461055170.

The spelling of 56687761 in words is "fifty-six million, six hundred eighty-seven thousand, seven hundred sixty-one".