65045556 has 72 divisors (see below), whose sum is σ = 172623360. Its totient is φ = 20627136.

The previous prime is 65045551. The next prime is 65045597. The reversal of 65045556 is 65554056.

It is a happy number.

65045556 is a `hidden beast` number, since 65 + 0 + 45 + 556 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 65045556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65045551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62085 + ... + 63123.

Almost surely, 2^65045556 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 65045556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86311680).

65045556 is an abundant number, since it is smaller than the sum of its proper divisors (107577804).

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

65045556 is a wasteful number, since it uses less digits than its factorization.

65045556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133 (or 1128 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The square root of 65045556 is about 8065.0825166268. The cubic root of 65045556 is about 402.1664863243.

The spelling of 65045556 in words is "sixty-five million, forty-five thousand, five hundred fifty-six".