65540670 has 64 divisors (see below), whose sum is σ = 170601984. Its totient is φ = 16018560.

The previous prime is 65540647. The next prime is 65540687. The reversal of 65540670 is 7604556.

65540670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 63055 + ... + 64085.

It is an arithmetic number, because the mean of its divisors is an integer number (2665656).

Almost surely, 2^65540670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65540670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85300992).

65540670 is an abundant number, since it is smaller than the sum of its proper divisors (105061314).

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

65540670 is a wasteful number, since it uses less digits than its factorization.

65540670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 65540670 is about 8095.7192392029. The cubic root of 65540670 is about 403.1843122872.

The spelling of 65540670 in words is "sixty-five million, five hundred forty thousand, six hundred seventy".