66584078 has 8 divisors (see below), whose sum is σ = 108955800. Its totient is φ = 30265480.

The previous prime is 66584051. The next prime is 66584083. The reversal of 66584078 is 87048566.

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

It is a super-2 number, since 2×66584078² = 8866878886220168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1513253 + ... + 1513296.

It is an arithmetic number, because the mean of its divisors is an integer number (13619475).

Almost surely, 2^66584078 is an apocalyptic number.

66584078 is a deficient number, since it is larger than the sum of its proper divisors (42371722).

66584078 is a wasteful number, since it uses less digits than its factorization.

66584078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3026562.

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 66584078 is about 8159.9067396631. The cubic root of 66584078 is about 405.3126235295.

The spelling of 66584078 in words is "sixty-six million, five hundred eighty-four thousand, seventy-eight".