3320646640 has 20 divisors (see below), whose sum is σ = 7720503624. Its totient is φ = 1328258624.

The previous prime is 3320646619. The next prime is 3320646647. The reversal of 3320646640 is 466460233.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×3320646640² = 22053388215486579200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3320646596 and 3320646605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3320646647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20753962 + ... + 20754121.

Almost surely, 2^3320646640 is an apocalyptic number.

It is an amenable number.

3320646640 is an abundant number, since it is smaller than the sum of its proper divisors (4399856984).

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

3320646640 is a wasteful number, since it uses less digits than its factorization.

3320646640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41508096 (or 41508090 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 34.

The square root of 3320646640 is about 57625.0521908657. The cubic root of 3320646640 is about 1491.9040325253.

The spelling of 3320646640 in words is "three billion, three hundred twenty million, six hundred forty-six thousand, six hundred forty".