65700040 has 128 divisors (see below), whose sum is σ = 177811200. Its totient is φ = 21381120.

The previous prime is 65700023. The next prime is 65700059. The reversal of 65700040 is 4000756.

It is a junction number, because it is equal to n+sod(n) for n = 65699984 and 65700020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 677272 + ... + 677368.

It is an arithmetic number, because the mean of its divisors is an integer number (1389150).

Almost surely, 2^65700040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65700040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88905600).

65700040 is an abundant number, since it is smaller than the sum of its proper divisors (112111160).

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

65700040 is a wasteful number, since it uses less digits than its factorization.

65700040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 65700040 is about 8105.5561191074. The cubic root of 65700040 is about 403.5108447668.

Adding to 65700040 its reverse (4000756), we get a palindrome (69700796).

The spelling of 65700040 in words is "sixty-five million, seven hundred thousand, forty".