65689480 has 64 divisors (see below), whose sum is σ = 151971840. Its totient is φ = 25546752.

The previous prime is 65689471. The next prime is 65689483. The reversal of 65689480 is 8498656.

It is a self number, because there is not a number n which added to its sum of digits gives 65689480.

It is not an unprimeable number, because it can be changed into a prime (65689483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340264 + ... + 340456.

It is an arithmetic number, because the mean of its divisors is an integer number (2374560).

Almost surely, 2^65689480 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 65689480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75985920).

65689480 is an abundant number, since it is smaller than the sum of its proper divisors (86282360).

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

65689480 is a wasteful number, since it uses less digits than its factorization.

65689480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 65689480 is about 8104.9046879035. The cubic root of 65689480 is about 403.4892247757.

The spelling of 65689480 in words is "sixty-five million, six hundred eighty-nine thousand, four hundred eighty".