556051661 has 8 divisors (see below), whose sum is σ = 616546848. Its totient is φ = 497214000.

The previous prime is 556051631. The next prime is 556051667. The reversal of 556051661 is 166150655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 556051661 - 2²² = 551857357 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 (556051667) 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, 413675 + ... + 415016.

It is an arithmetic number, because the mean of its divisors is an integer number (77068356).

Almost surely, 2^556051661 is an apocalyptic number.

It is an amenable number.

556051661 is a deficient number, since it is larger than the sum of its proper divisors (60495187).

556051661 is a wasteful number, since it uses less digits than its factorization.

556051661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828763.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 556051661 is about 23580.7476768655. The cubic root of 556051661 is about 822.3153188888.

The spelling of 556051661 in words is "five hundred fifty-six million, fifty-one thousand, six hundred sixty-one".