556778066 has 16 divisors (see below), whose sum is σ = 938516544. Its totient is φ = 245801424.

The previous prime is 556778063. The next prime is 556778069. The reversal of 556778066 is 660877655.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (556778063) and next prime (556778069).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (556778063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 464936 + ... + 466131.

It is an arithmetic number, because the mean of its divisors is an integer number (58657284).

Almost surely, 2^556778066 is an apocalyptic number.

556778066 is a deficient number, since it is larger than the sum of its proper divisors (381738478).

556778066 is a wasteful number, since it uses less digits than its factorization.

556778066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931105.

The product of its (nonzero) digits is 2116800, while the sum is 50.

The square root of 556778066 is about 23596.1451512742. The cubic root of 556778066 is about 822.6732436874.

The spelling of 556778066 in words is "five hundred fifty-six million, seven hundred seventy-eight thousand, sixty-six".