66482578 has 4 divisors (see below), whose sum is σ = 99723870. Its totient is φ = 33241288.

The previous prime is 66482573. The next prime is 66482623. The reversal of 66482578 is 87528466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87528466 = 2 ⋅43764233.

It can be written as a sum of positive squares in only one way, i.e., 63568729 + 2913849 = 7973^2 + 1707^2 .

It is not an unprimeable number, because it can be changed into a prime (66482573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16620643 + ... + 16620646.

Almost surely, 2^66482578 is an apocalyptic number.

66482578 is a deficient number, since it is larger than the sum of its proper divisors (33241292).

66482578 is a wasteful number, since it uses less digits than its factorization.

66482578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33241291.

The product of its digits is 645120, while the sum is 46.

The square root of 66482578 is about 8153.6849338198. The cubic root of 66482578 is about 405.1065674958.

The spelling of 66482578 in words is "sixty-six million, four hundred eighty-two thousand, five hundred seventy-eight".