64566546 has 32 divisors (see below), whose sum is σ = 142000128. Its totient is φ = 19409040.

The previous prime is 64566539. The next prime is 64566547.

It is a happy number.

64566546 is nontrivially palindromic in base 10.

64566546 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 64566498 and 64566507.

It is not an unprimeable number, because it can be changed into a prime (64566547) 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 15 ways as a sum of consecutive naturals, for example, 4531 + ... + 12233.

It is an arithmetic number, because the mean of its divisors is an integer number (4437504).

Almost surely, 2^64566546 is an apocalyptic number.

64566546 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 64566546, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71000064).

64566546 is an abundant number, since it is smaller than the sum of its proper divisors (77433582).

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

64566546 is a wasteful number, since it uses less digits than its factorization.

64566546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7846.

The product of its digits is 518400, while the sum is 42.

The square root of 64566546 is about 8035.3311070546. The cubic root of 64566546 is about 401.1768383996.

The spelling of 64566546 in words is "sixty-four million, five hundred sixty-six thousand, five hundred forty-six".