65803640 has 32 divisors (see below), whose sum is σ = 169210080. Its totient is φ = 22561152.

The previous prime is 65803637. The next prime is 65803643. The reversal of 65803640 is 4630856.

It is an interprime number because it is at equal distance from previous prime (65803637) and next prime (65803643).

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 65803597 and 65803606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65803643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117227 + ... + 117786.

It is an arithmetic number, because the mean of its divisors is an integer number (5287815).

Almost surely, 2^65803640 is an apocalyptic number.

It is an amenable number.

65803640 is an abundant number, since it is smaller than the sum of its proper divisors (103406440).

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

65803640 is a wasteful number, since it uses less digits than its factorization.

65803640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235031 (or 235027 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 65803640 is about 8111.9442798875. The cubic root of 65803640 is about 403.7228272345.

The spelling of 65803640 in words is "sixty-five million, eight hundred three thousand, six hundred forty".