65006556 has 48 divisors (see below), whose sum is σ = 158989824. Its totient is φ = 20633536.

The previous prime is 65006537. The next prime is 65006561. The reversal of 65006556 is 65560056.

It is a super-2 number, since 2×65006556² = 8451704645962272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87121 + ... + 87863.

It is an arithmetic number, because the mean of its divisors is an integer number (3312288).

Almost surely, 2^65006556 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 65006556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79494912).

65006556 is an abundant number, since it is smaller than the sum of its proper divisors (93983268).

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

65006556 is a wasteful number, since it uses less digits than its factorization.

65006556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090 (or 1088 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 65006556 is about 8062.6643239068. The cubic root of 65006556 is about 402.0860932906.

The spelling of 65006556 in words is "sixty-five million, six thousand, five hundred fifty-six".