65941890 has 64 divisors (see below), whose sum is σ = 182718720. Its totient is φ = 14918400.

The previous prime is 65941877. The next prime is 65941903. The reversal of 65941890 is 9814956.

65941890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (65941877) and next prime (65941903).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19656 + ... + 22764.

It is an arithmetic number, because the mean of its divisors is an integer number (2854980).

Almost surely, 2^65941890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65941890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91359360).

65941890 is an abundant number, since it is smaller than the sum of its proper divisors (116776830).

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

65941890 is a wasteful number, since it uses less digits than its factorization.

65941890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3227.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 65941890 is about 8120.4611937993. The cubic root of 65941890 is about 404.0053629651.

The spelling of 65941890 in words is "sixty-five million, nine hundred forty-one thousand, eight hundred ninety".