65913750 has 240 divisors, whose sum is σ = 218330112. Its totient is φ = 14580000.

The previous prime is 65913739. The next prime is 65913751. The reversal of 65913750 is 5731956.

It is a happy number.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65913751) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 2126235 + ... + 2126265.

Almost surely, 2^65913750 is an apocalyptic number.

65913750 is the 4340-th nonagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65913750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109165056).

65913750 is an abundant number, since it is smaller than the sum of its proper divisors (152416362).

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

65913750 is an equidigital number, since it uses as much as digits as its factorization.

65913750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 65913750 is about 8118.7283487009. The cubic root of 65913750 is about 403.9478864584.

The spelling of 65913750 in words is "sixty-five million, nine hundred thirteen thousand, seven hundred fifty".