65681475 has 24 divisors (see below), whose sum is σ = 111533040. Its totient is φ = 34081920.

The previous prime is 65681453. The next prime is 65681477. The reversal of 65681475 is 57418656.

65681475 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65681475 - 2⁵ = 65681443 is a prime.

It is a super-4 number, since 4×65681475⁴ (a number of 32 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (65681477) 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 23 ways as a sum of consecutive naturals, for example, 9060 + ... + 14609.

It is an arithmetic number, because the mean of its divisors is an integer number (4647210).

Almost surely, 2^65681475 is an apocalyptic number.

65681475 is a deficient number, since it is larger than the sum of its proper divisors (45851565).

65681475 is a wasteful number, since it uses less digits than its factorization.

65681475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23719 (or 23714 counting only the distinct ones).

The product of its digits is 201600, while the sum is 42.

The square root of 65681475 is about 8104.4108360818. The cubic root of 65681475 is about 403.4728342138.

The spelling of 65681475 in words is "sixty-five million, six hundred eighty-one thousand, four hundred seventy-five".