65689620 has 48 divisors (see below), whose sum is σ = 189869568. Its totient is φ = 16951680.

The previous prime is 65689609. The next prime is 65689627. The reversal of 65689620 is 2698656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65689627) 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, 15799 + ... + 19518.

It is an arithmetic number, because the mean of its divisors is an integer number (3955616).

Almost surely, 2^65689620 is an apocalyptic number.

65689620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65689620 is an abundant number, since it is smaller than the sum of its proper divisors (124179948).

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

65689620 is a wasteful number, since it uses less digits than its factorization.

65689620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35360 (or 35358 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 65689620 is about 8104.9133246445. The cubic root of 65689620 is about 403.4895114195.

The spelling of 65689620 in words is "sixty-five million, six hundred eighty-nine thousand, six hundred twenty".