65609874 has 48 divisors (see below), whose sum is σ = 155862720. Its totient is φ = 19781280.

The previous prime is 65609849. The next prime is 65609899. The reversal of 65609874 is 47890656.

65609874 is a `hidden beast` number, since 6 + 560 + 9 + 87 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (65609849) and next prime (65609899).

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 23 ways as a sum of consecutive naturals, for example, 44619 + ... + 46065.

It is an arithmetic number, because the mean of its divisors is an integer number (3247140).

Almost surely, 2^65609874 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65609874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77931360).

65609874 is an abundant number, since it is smaller than the sum of its proper divisors (90252846).

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

65609874 is a wasteful number, since it uses less digits than its factorization.

65609874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695 (or 1692 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 65609874 is about 8099.9922222185. The cubic root of 65609874 is about 403.3261690021.

The spelling of 65609874 in words is "sixty-five million, six hundred nine thousand, eight hundred seventy-four".