65706840 has 48 divisors (see below), whose sum is σ = 213548400. Its totient is φ = 17521728.

The previous prime is 65706827. The next prime is 65706841. The reversal of 65706840 is 4860756.

It is a happy number.

65706840 is a `hidden beast` number, since 6 + 570 + 6 + 84 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 65706795 and 65706804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65706841) 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, 90900 + ... + 91619.

It is an arithmetic number, because the mean of its divisors is an integer number (4448925).

Almost surely, 2^65706840 is an apocalyptic number.

65706840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65706840 is an abundant number, since it is smaller than the sum of its proper divisors (147841560).

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

65706840 is a wasteful number, since it uses less digits than its factorization.

65706840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182536 (or 182529 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 65706840 is about 8105.9755736123. The cubic root of 65706840 is about 403.5247655045.

The spelling of 65706840 in words is "sixty-five million, seven hundred six thousand, eight hundred forty".