65538330 has 64 divisors (see below), whose sum is σ = 184802688. Its totient is φ = 14664960.

The previous prime is 65538329. The next prime is 65538337. The reversal of 65538330 is 3383556.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65538291 and 65538300.

It is not an unprimeable number, because it can be changed into a prime (65538337) by changing a digit.

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, 3349 + ... + 11928.

It is an arithmetic number, because the mean of its divisors is an integer number (2887542).

Almost surely, 2^65538330 is an apocalyptic number.

65538330 is an abundant number, since it is smaller than the sum of its proper divisors (119264358).

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

65538330 is a wasteful number, since it uses less digits than its factorization.

65538330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15311.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 65538330 is about 8095.5747170908. The cubic root of 65538330 is about 403.1795139306.

The spelling of 65538330 in words is "sixty-five million, five hundred thirty-eight thousand, three hundred thirty".