65477440 has 56 divisors (see below), whose sum is σ = 178198272. Its totient is φ = 22448640.

The previous prime is 65477431. The next prime is 65477441. The reversal of 65477440 is 4477456.

65477440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-3 number, since 3×65477440³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65477440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65477441) 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 7 ways as a sum of consecutive naturals, for example, 12376 + ... + 16855.

It is an arithmetic number, because the mean of its divisors is an integer number (3182112).

Almost surely, 2^65477440 is an apocalyptic number.

It is an amenable number.

65477440 is an abundant number, since it is smaller than the sum of its proper divisors (112720832).

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

65477440 is a wasteful number, since it uses less digits than its factorization.

65477440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29255 (or 29245 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 37.

The square root of 65477440 is about 8091.8131466316. The cubic root of 65477440 is about 403.0546139557.

The spelling of 65477440 in words is "sixty-five million, four hundred seventy-seven thousand, four hundred forty".