65210778 has 32 divisors (see below), whose sum is σ = 145252800. Its totient is φ = 21685968.

The previous prime is 65210777. The next prime is 65210797. The reversal of 65210778 is 87701256.

65210778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (65210771) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 27088 + ... + 29396.

It is an arithmetic number, because the mean of its divisors is an integer number (4539150).

Almost surely, 2^65210778 is an apocalyptic number.

65210778 is an abundant number, since it is smaller than the sum of its proper divisors (80042022).

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

65210778 is a wasteful number, since it uses less digits than its factorization.

65210778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2843 (or 2837 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 65210778 is about 8075.3190649039. The cubic root of 65210778 is about 402.5067123349.

The spelling of 65210778 in words is "sixty-five million, two hundred ten thousand, seven hundred seventy-eight".