64557330 has 32 divisors (see below), whose sum is σ = 164052864. Its totient is φ = 16202496.

The previous prime is 64557323. The next prime is 64557371. The reversal of 64557330 is 3375546.

It is a junction number, because it is equal to n+sod(n) for n = 64557291 and 64557300.

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 15 ways as a sum of consecutive naturals, for example, 62782 + ... + 63801.

It is an arithmetic number, because the mean of its divisors is an integer number (5126652).

Almost surely, 2^64557330 is an apocalyptic number.

64557330 is an abundant number, since it is smaller than the sum of its proper divisors (99495534).

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

64557330 is a wasteful number, since it uses less digits than its factorization.

64557330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126610.

The product of its (nonzero) digits is 37800, while the sum is 33.

The square root of 64557330 is about 8034.7576192440. The cubic root of 64557330 is about 401.1577499712.

It can be divided in two parts, 645 and 57330, that added together give a palindrome (57975).

The spelling of 64557330 in words is "sixty-four million, five hundred fifty-seven thousand, three hundred thirty".