56580071866 has 4 divisors (see below), whose sum is σ = 84870107802. Its totient is φ = 28290035932.

The previous prime is 56580071843. The next prime is 56580071897. The reversal of 56580071866 is 66817008565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66817008565 = 5 ⋅13363401713.

It can be written as a sum of positive squares in only one way, i.e., 30375261225 + 26204810641 = 174285^2 + 161879^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14145017965 + ... + 14145017968.

Almost surely, 2^56580071866 is an apocalyptic number.

56580071866 is a deficient number, since it is larger than the sum of its proper divisors (28290035936).

56580071866 is a wasteful number, since it uses less digits than its factorization.

56580071866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28290035935.

The product of its (nonzero) digits is 2419200, while the sum is 52.

The spelling of 56580071866 in words is "fifty-six billion, five hundred eighty million, seventy-one thousand, eight hundred sixty-six".