556616600021 has 8 divisors (see below), whose sum is σ = 560208002784. Its totient is φ = 553027350960.

The previous prime is 556616600003. The next prime is 556616600039. The reversal of 556616600021 is 120006616655.

556616600021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (556616600003) and next prime (556616600039).

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 556616600021 - 2¹⁴ = 556616583637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556616600081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18251 + ... + 1055256.

It is an arithmetic number, because the mean of its divisors is an integer number (70026000348).

Almost surely, 2^556616600021 is an apocalyptic number.

It is an amenable number.

556616600021 is a deficient number, since it is larger than the sum of its proper divisors (3591402763).

556616600021 is a wasteful number, since it uses less digits than its factorization.

556616600021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076851.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 556616600021 in words is "five hundred fifty-six billion, six hundred sixteen million, six hundred thousand, twenty-one".