3966635345220 has 72 divisors (see below), whose sum is σ = 12032410126464. Its totient is φ = 1057744554048.

The previous prime is 3966635345219. The next prime is 3966635345243. The reversal of 3966635345220 is 225435366693.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8178757 + ... + 8650163.

It is an arithmetic number, because the mean of its divisors is an integer number (167116807312).

Almost surely, 2^{3966635345220} is an apocalyptic number.

3966635345220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3966635345220 is an abundant number, since it is smaller than the sum of its proper divisors (8065774781244).

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

3966635345220 is a wasteful number, since it uses less digits than its factorization.

3966635345220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518169 (or 518164 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 54.

The spelling of 3966635345220 in words is "three trillion, nine hundred sixty-six billion, six hundred thirty-five million, three hundred forty-five thousand, two hundred twenty".