56677778 has 4 divisors (see below), whose sum is σ = 85016670. Its totient is φ = 28338888.

The previous prime is 56677757. The next prime is 56677783. The reversal of 56677778 is 87777665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87777665 = 5 ⋅17555533.

It can be written as a sum of positive squares in only one way, i.e., 32638369 + 24039409 = 5713^2 + 4903^2 .

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14169443 + ... + 14169446.

Almost surely, 2^56677778 is an apocalyptic number.

56677778 is a deficient number, since it is larger than the sum of its proper divisors (28338892).

56677778 is a wasteful number, since it uses less digits than its factorization.

56677778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28338891.

The product of its digits is 3457440, while the sum is 53.

The square root of 56677778 is about 7528.4645180807. The cubic root of 56677778 is about 384.1235541723.

The spelling of 56677778 in words is "fifty-six million, six hundred seventy-seven thousand, seven hundred seventy-eight".