65449998 has 32 divisors (see below), whose sum is σ = 147916800. Its totient is φ = 21445848.

The previous prime is 65449997. The next prime is 65450009. The reversal of 65449998 is 89994456.

65449998 is a `hidden beast` number, since 6 + 544 + 9 + 9 + 98 = 666.

65449998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65449997) 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, 7086 + ... + 13457.

It is an arithmetic number, because the mean of its divisors is an integer number (4622400).

Almost surely, 2^65449998 is an apocalyptic number.

65449998 is an abundant number, since it is smaller than the sum of its proper divisors (82466802).

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

65449998 is a wasteful number, since it uses less digits than its factorization.

65449998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20613 (or 20607 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 65449998 is about 8090.1173044648. The cubic root of 65449998 is about 402.9982985272.

The spelling of 65449998 in words is "sixty-five million, four hundred forty-nine thousand, nine hundred ninety-eight".