66078538 has 8 divisors (see below), whose sum is σ = 99273888. Its totient is φ = 32987244.

The previous prime is 66078521. The next prime is 66078557. The reversal of 66078538 is 83587066.

66078538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 66078494 and 66078503.

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 3 ways as a sum of consecutive naturals, for example, 24406 + ... + 26977.

It is an arithmetic number, because the mean of its divisors is an integer number (12409236).

Almost surely, 2^66078538 is an apocalyptic number.

66078538 is a deficient number, since it is larger than the sum of its proper divisors (33195350).

66078538 is a wasteful number, since it uses less digits than its factorization.

66078538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52028.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 66078538 is about 8128.8706472671. The cubic root of 66078538 is about 404.2842369595.

The spelling of 66078538 in words is "sixty-six million, seventy-eight thousand, five hundred thirty-eight".