66039078 has 16 divisors (see below), whose sum is σ = 150946560. Its totient is φ = 18868296.

The previous prime is 66039059. The next prime is 66039091. The reversal of 66039078 is 87093066.

It is a super-2 number, since 2×66039078² = 8722319646180168, 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 786138 + ... + 786221.

It is an arithmetic number, because the mean of its divisors is an integer number (9434160).

Almost surely, 2^66039078 is an apocalyptic number.

66039078 is an abundant number, since it is smaller than the sum of its proper divisors (84907482).

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

66039078 is a wasteful number, since it uses less digits than its factorization.

66039078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572371.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 66039078 is about 8126.4431333764. The cubic root of 66039078 is about 404.2037457084.

The spelling of 66039078 in words is "sixty-six million, thirty-nine thousand, seventy-eight".