65491078 has 4 divisors (see below), whose sum is σ = 98236620. Its totient is φ = 32745538.

The previous prime is 65491061. The next prime is 65491087. The reversal of 65491078 is 87019456.

65491078 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 65491078.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 16372768 + ... + 16372771.

It is an arithmetic number, because the mean of its divisors is an integer number (24559155).

Almost surely, 2^65491078 is an apocalyptic number.

65491078 is a deficient number, since it is larger than the sum of its proper divisors (32745542).

65491078 is a wasteful number, since it uses less digits than its factorization.

65491078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32745541.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 65491078 is about 8092.6558063469. The cubic root of 65491078 is about 403.0825954876.

The spelling of 65491078 in words is "sixty-five million, four hundred ninety-one thousand, seventy-eight".