56666679794 has 8 divisors (see below), whose sum is σ = 85082307420. Its totient is φ = 28305910656.

The previous prime is 56666679793. The next prime is 56666679829. The reversal of 56666679794 is 49797666665.

It can be written as a sum of positive squares in 2 ways, for example, as 46382083225 + 10284596569 = 215365^2 + 101413^2 .

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

It is a super-2 number, since 2×56666679794² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56666679791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13712039 + ... + 13716170.

Almost surely, 2^56666679794 is an apocalyptic number.

56666679794 is a deficient number, since it is larger than the sum of its proper divisors (28415627626).

56666679794 is a wasteful number, since it uses less digits than its factorization.

56666679794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27429244.

The product of its digits is 617258880, while the sum is 71.

The spelling of 56666679794 in words is "fifty-six billion, six hundred sixty-six million, six hundred seventy-nine thousand, seven hundred ninety-four".