56678687665 has 8 divisors (see below), whose sum is σ = 68833876608. Its totient is φ = 44796649200.

The previous prime is 56678687621. The next prime is 56678687669.

56678687665 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 56678687665 - 2¹⁷ = 56678556593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56678687594 and 56678687603.

It is not an unprimeable number, because it can be changed into a prime (56678687669) 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, 68287161 + ... + 68287990.

It is an arithmetic number, because the mean of its divisors is an integer number (8604234576).

Almost surely, 2^56678687665 is an apocalyptic number.

It is an amenable number.

56678687665 is a deficient number, since it is larger than the sum of its proper divisors (12155188943).

56678687665 is a wasteful number, since it uses less digits than its factorization.

56678687665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136575239.

The product of its digits is 609638400, while the sum is 70.

The spelling of 56678687665 in words is "fifty-six billion, six hundred seventy-eight million, six hundred eighty-seven thousand, six hundred sixty-five".