64566420 has 24 divisors (see below), whose sum is σ = 180786144. Its totient is φ = 17217696.

The previous prime is 64566377. The next prime is 64566421. The reversal of 64566420 is 2466546.

64566420 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 not an unprimeable number, because it can be changed into a prime (64566421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 537994 + ... + 538113.

It is an arithmetic number, because the mean of its divisors is an integer number (7532756).

Almost surely, 2^64566420 is an apocalyptic number.

64566420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64566420 is an abundant number, since it is smaller than the sum of its proper divisors (116219724).

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

64566420 is a wasteful number, since it uses less digits than its factorization.

64566420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076119 (or 1076117 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 64566420 is about 8035.3232666770. The cubic root of 64566420 is about 401.1765774372.

The spelling of 64566420 in words is "sixty-four million, five hundred sixty-six thousand, four hundred twenty".