3330221778 has 48 divisors (see below), whose sum is σ = 7980552216. Its totient is φ = 996986880.

The previous prime is 3330221771. The next prime is 3330221809. The reversal of 3330221778 is 8771220333.

It can be written as a sum of positive squares in 4 ways, for example, as 2659774329 + 670447449 = 51573^2 + 25893^2 .

It is a super-2 number, since 2×3330221778² = 22180754181330962568, which contains 22 as substring.

3330221778 is a modest number, since divided by 221778 gives 3330 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3330221771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 183663 + ... + 200978.

Almost surely, 2^3330221778 is an apocalyptic number.

3330221778 is an abundant number, since it is smaller than the sum of its proper divisors (4650330438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3330221778 is a wasteful number, since it uses less digits than its factorization.

3330221778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384699 (or 384696 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 3330221778 is about 57708.0737678880. The cubic root of 3330221778 is about 1493.3366328561.

The spelling of 3330221778 in words is "three billion, three hundred thirty million, two hundred twenty-one thousand, seven hundred seventy-eight".