65645404 has 36 divisors (see below), whose sum is σ = 131784912. Its totient is φ = 28536640.

The previous prime is 65645353. The next prime is 65645407. The reversal of 65645404 is 40454656.

It is a self number, because there is not a number n which added to its sum of digits gives 65645404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65645407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8184 + ... + 14080.

It is an arithmetic number, because the mean of its divisors is an integer number (3660692).

Almost surely, 2^65645404 is an apocalyptic number.

It is an amenable number.

65645404 is an abundant number, since it is smaller than the sum of its proper divisors (66139508).

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

65645404 is a wasteful number, since it uses less digits than its factorization.

65645404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5946 (or 5933 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 65645404 is about 8102.1851373565. The cubic root of 65645404 is about 403.3989608545.

It can be divided in two parts, 65645 and 404, that added together give a square (66049 = 257²).

The spelling of 65645404 in words is "sixty-five million, six hundred forty-five thousand, four hundred four".