65861730 has 96 divisors (see below), whose sum is σ = 189641088. Its totient is φ = 15724800.

The previous prime is 65861717. The next prime is 65861743. The reversal of 65861730 is 3716856.

65861730 is a `hidden beast` number, since 6 + 5 + 8 + 617 + 30 = 666.

It is an interprime number because it is at equal distance from previous prime (65861717) and next prime (65861743).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 69822 + ... + 70758.

It is an arithmetic number, because the mean of its divisors is an integer number (1975428).

Almost surely, 2^65861730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65861730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94820544).

65861730 is an abundant number, since it is smaller than the sum of its proper divisors (123779358).

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

65861730 is a wasteful number, since it uses less digits than its factorization.

65861730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032 (or 1029 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 65861730 is about 8115.5240126562. The cubic root of 65861730 is about 403.8415914922.

The spelling of 65861730 in words is "sixty-five million, eight hundred sixty-one thousand, seven hundred thirty".