65674640 has 40 divisors (see below), whose sum is σ = 160733760. Its totient is φ = 24886656.

The previous prime is 65674633. The next prime is 65674643. The reversal of 65674640 is 4647656.

65674640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 65674594 and 65674603.

It is not an unprimeable number, because it can be changed into a prime (65674643) 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 7 ways as a sum of consecutive naturals, for example, 20084 + ... + 23123.

It is an arithmetic number, because the mean of its divisors is an integer number (4018344).

Almost surely, 2^65674640 is an apocalyptic number.

It is an amenable number.

65674640 is an abundant number, since it is smaller than the sum of its proper divisors (95059120).

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

65674640 is a wasteful number, since it uses less digits than its factorization.

65674640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43239 (or 43233 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 65674640 is about 8103.9891411576. The cubic root of 65674640 is about 403.4588382204.

The spelling of 65674640 in words is "sixty-five million, six hundred seventy-four thousand, six hundred forty".