56663786 has 4 divisors (see below), whose sum is σ = 84995682. Its totient is φ = 28331892.

The previous prime is 56663773. The next prime is 56663797. The reversal of 56663786 is 68736665.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68736665 = 5 ⋅13747333.

It can be written as a sum of positive squares in only one way, i.e., 47872561 + 8791225 = 6919^2 + 2965^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 56663786.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14165945 + ... + 14165948.

Almost surely, 2^56663786 is an apocalyptic number.

56663786 is a deficient number, since it is larger than the sum of its proper divisors (28331896).

56663786 is a wasteful number, since it uses less digits than its factorization.

56663786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28331895.

The product of its digits is 1088640, while the sum is 47.

The square root of 56663786 is about 7527.5351875631. The cubic root of 56663786 is about 384.0919421408.

The spelling of 56663786 in words is "fifty-six million, six hundred sixty-three thousand, seven hundred eighty-six".