556025661 has 16 divisors (see below), whose sum is σ = 824120320. Its totient is φ = 370513440.

The previous prime is 556025629. The next prime is 556025663. The reversal of 556025661 is 166520655.

It is a happy number.

It is not a de Polignac number, because 556025661 - 2⁵ = 556025629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556025663) 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 15 ways as a sum of consecutive naturals, for example, 88521 + ... + 94593.

It is an arithmetic number, because the mean of its divisors is an integer number (51507520).

Almost surely, 2^556025661 is an apocalyptic number.

It is an amenable number.

556025661 is a deficient number, since it is larger than the sum of its proper divisors (268094659).

556025661 is a wasteful number, since it uses less digits than its factorization.

556025661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9473 (or 9467 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 556025661 is about 23580.1963732281. The cubic root of 556025661 is about 822.3025020152.

The spelling of 556025661 in words is "five hundred fifty-six million, twenty-five thousand, six hundred sixty-one".