65978450 has 48 divisors (see below), whose sum is σ = 130200000. Its totient is φ = 24805440.

The previous prime is 65978441. The next prime is 65978477. The reversal of 65978450 is 5487956.

65978450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 23 ways as a sum of consecutive naturals, for example, 188876 + ... + 189224.

It is an arithmetic number, because the mean of its divisors is an integer number (2712500).

Almost surely, 2^65978450 is an apocalyptic number.

65978450 is a deficient number, since it is larger than the sum of its proper divisors (64221550).

65978450 is a wasteful number, since it uses less digits than its factorization.

65978450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579 (or 574 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 65978450 is about 8122.7119855378. The cubic root of 65978450 is about 404.0800130709.

The spelling of 65978450 in words is "sixty-five million, nine hundred seventy-eight thousand, four hundred fifty".