556661395 has 4 divisors (see below), whose sum is σ = 667993680. Its totient is φ = 445329112.

The previous prime is 556661377. The next prime is 556661407. The reversal of 556661395 is 593166655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 593166655 = 5 ⋅118633331.

It is a cyclic number.

It is not a de Polignac number, because 556661395 - 2¹¹ = 556659347 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55666135 + ... + 55666144.

It is an arithmetic number, because the mean of its divisors is an integer number (166998420).

Almost surely, 2^556661395 is an apocalyptic number.

556661395 is a deficient number, since it is larger than the sum of its proper divisors (111332285).

556661395 is a wasteful number, since it uses less digits than its factorization.

556661395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111332284.

The product of its digits is 729000, while the sum is 46.

The square root of 556661395 is about 23593.6727747081. The cubic root of 556661395 is about 822.6157768552.

The spelling of 556661395 in words is "five hundred fifty-six million, six hundred sixty-one thousand, three hundred ninety-five".