56656786 has 4 divisors (see below), whose sum is σ = 84985182. Its totient is φ = 28328392.

The previous prime is 56656781. The next prime is 56656811. The reversal of 56656786 is 68765665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68765665 = 5 ⋅13753133.

It can be written as a sum of positive squares in only one way, i.e., 45225625 + 11431161 = 6725^2 + 3381^2 .

It is not an unprimeable number, because it can be changed into a prime (56656781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14164195 + ... + 14164198.

Almost surely, 2^56656786 is an apocalyptic number.

56656786 is a deficient number, since it is larger than the sum of its proper divisors (28328396).

56656786 is a wasteful number, since it uses less digits than its factorization.

56656786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28328395.

The product of its digits is 1814400, while the sum is 49.

The square root of 56656786 is about 7527.0702135692. The cubic root of 56656786 is about 384.0761251349.

The spelling of 56656786 in words is "fifty-six million, six hundred fifty-six thousand, seven hundred eighty-six".