3866564820 has 48 divisors (see below), whose sum is σ = 10933590528. Its totient is φ = 1020873600.

The previous prime is 3866564797. The next prime is 3866564827. The reversal of 3866564820 is 284656683.

It is a self number, because there is not a number n which added to its sum of digits gives 3866564820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3866564827) 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 15 ways as a sum of consecutive naturals, for example, 312964 + ... + 325083.

It is an arithmetic number, because the mean of its divisors is an integer number (227783136).

Almost surely, 2^3866564820 is an apocalyptic number.

3866564820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3866564820 is an abundant number, since it is smaller than the sum of its proper divisors (7067025708).

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

3866564820 is a wasteful number, since it uses less digits than its factorization.

3866564820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638160 (or 638158 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 48.

The square root of 3866564820 is about 62181.7080820397. The cubic root of 3866564820 is about 1569.5497945075.

The spelling of 3866564820 in words is "three billion, eight hundred sixty-six million, five hundred sixty-four thousand, eight hundred twenty".