65506500 has 72 divisors (see below), whose sum is σ = 206665368. Its totient is φ = 17467200.

The previous prime is 65506499. The next prime is 65506513. The reversal of 65506500 is 560556.

65506500 is a `hidden beast` number, since 6 + 5 + 5 + 0 + 650 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9884736 + 55621764 = 3144^2 + 7458^2 .

It is a super-2 number, since 2×65506500² = 8582203084500000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2779 + ... + 11778.

Almost surely, 2^65506500 is an apocalyptic number.

65506500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65506500 is an abundant number, since it is smaller than the sum of its proper divisors (141158868).

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

65506500 is a wasteful number, since it uses less digits than its factorization.

65506500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14582 (or 14567 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 65506500 is about 8093.6085894983. The cubic root of 65506500 is about 403.1142326311.

The spelling of 65506500 in words is "sixty-five million, five hundred six thousand, five hundred".