65445750 has 192 divisors, whose sum is σ = 197121600. Its totient is φ = 15590400.

The previous prime is 65445707. The next prime is 65445763. The reversal of 65445750 is 5754456.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1109221 + ... + 1109279.

It is an arithmetic number, because the mean of its divisors is an integer number (1026675).

Almost surely, 2^65445750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65445750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98560800).

65445750 is an abundant number, since it is smaller than the sum of its proper divisors (131675850).

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

65445750 is a wasteful number, since it uses less digits than its factorization.

65445750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The square root of 65445750 is about 8089.8547576579. The cubic root of 65445750 is about 402.9895795363.

The spelling of 65445750 in words is "sixty-five million, four hundred forty-five thousand, seven hundred fifty".