56706691 has 8 divisors (see below), whose sum is σ = 57327104. Its totient is φ = 56089800.

The previous prime is 56706667. The next prime is 56706701. The reversal of 56706691 is 19660765.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56706691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56706631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42070 + ... + 43396.

It is an arithmetic number, because the mean of its divisors is an integer number (7165888).

Almost surely, 2^56706691 is an apocalyptic number.

56706691 is a deficient number, since it is larger than the sum of its proper divisors (620413).

56706691 is a wasteful number, since it uses less digits than its factorization.

56706691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 56706691 is about 7530.3845187348. The cubic root of 56706691 is about 384.1888606394.

The spelling of 56706691 in words is "fifty-six million, seven hundred six thousand, six hundred ninety-one".