2216660403625 has 16 divisors (see below), whose sum is σ = 2766505712256. Its totient is φ = 1773255548400.

The previous prime is 2216660403583. The next prime is 2216660403677. The reversal of 2216660403625 is 5263040666122.

It is not a de Polignac number, because 2216660403625 - 2¹⁷ = 2216660272553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2804124 + ... + 3506626.

It is an arithmetic number, because the mean of its divisors is an integer number (172906607016).

Almost surely, 2^{2216660403625} is an apocalyptic number.

2216660403625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2216660403625 is a deficient number, since it is larger than the sum of its proper divisors (549845308631).

2216660403625 is an equidigital number, since it uses as much as digits as its factorization.

2216660403625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727761 (or 727751 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 2216660403625 in words is "two trillion, two hundred sixteen billion, six hundred sixty million, four hundred three thousand, six hundred twenty-five".