3207665820 has 48 divisors (see below), whose sum is σ = 9040969728. Its totient is φ = 849710400.

The previous prime is 3207665819. The next prime is 3207665837. The reversal of 3207665820 is 285667023.

3207665820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent 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, 167964 + ... + 186083.

It is an arithmetic number, because the mean of its divisors is an integer number (188353536).

Almost surely, 2^3207665820 is an apocalyptic number.

3207665820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3207665820 is an abundant number, since it is smaller than the sum of its proper divisors (5833303908).

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

3207665820 is a wasteful number, since it uses less digits than its factorization.

3207665820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354210 (or 354208 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 3207665820 is about 56636.2588806853. The cubic root of 3207665820 is about 1474.7883745030.

The spelling of 3207665820 in words is "three billion, two hundred seven million, six hundred sixty-five thousand, eight hundred twenty".