5556365566 has 4 divisors (see below), whose sum is σ = 8334548352. Its totient is φ = 2778182782.

The previous prime is 5556365509. The next prime is 5556365603. The reversal of 5556365566 is 6655636555.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6655636555 = 5 ⋅1331127311.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389091390 + ... + 1389091393.

It is an arithmetic number, because the mean of its divisors is an integer number (2083637088).

Almost surely, 2^5556365566 is an apocalyptic number.

5556365566 is a deficient number, since it is larger than the sum of its proper divisors (2778182786).

5556365566 is a wasteful number, since it uses less digits than its factorization.

5556365566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778182785.

The product of its digits is 12150000, while the sum is 52.

The square root of 5556365566 is about 74541.0327671947. The cubic root of 5556365566 is about 1771.1836875753.

The spelling of 5556365566 in words is "five billion, five hundred fifty-six million, three hundred sixty-five thousand, five hundred sixty-six".