64563330 has 64 divisors (see below), whose sum is σ = 175674240. Its totient is φ = 15054336.

The previous prime is 64563329. The next prime is 64563377. The reversal of 64563330 is 3336546.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3054 + ... + 11766.

It is an arithmetic number, because the mean of its divisors is an integer number (2744910).

Almost surely, 2^64563330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64563330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87837120).

64563330 is an abundant number, since it is smaller than the sum of its proper divisors (111110910).

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

64563330 is a wasteful number, since it uses less digits than its factorization.

64563330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8755.

The product of its (nonzero) digits is 19440, while the sum is 30.

The square root of 64563330 is about 8035.1309883536. The cubic root of 64563330 is about 401.1701775398.

Adding to 64563330 its reverse (3336546), we get a palindrome (67899876).

The spelling of 64563330 in words is "sixty-four million, five hundred sixty-three thousand, three hundred thirty".