66486419 has 4 divisors (see below), whose sum is σ = 67171944. Its totient is φ = 65800896.

The previous prime is 66486391. The next prime is 66486421. The reversal of 66486419 is 91468466.

66486419 = T₁₁₂₂ + T₁₁₂₃ + ... + T₁₂₁₈.

66486419 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66486419 - 2¹² = 66482323 is a prime.

It is a super-2 number, since 2×66486419² = 8840887822887122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66486419.

It is not an unprimeable number, because it can be changed into a prime (66486449) by changing a digit.

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, 342617 + ... + 342810.

It is an arithmetic number, because the mean of its divisors is an integer number (16792986).

Almost surely, 2^66486419 is an apocalyptic number.

66486419 is a deficient number, since it is larger than the sum of its proper divisors (685525).

66486419 is an equidigital number, since it uses as much as digits as its factorization.

66486419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685524.

The product of its digits is 248832, while the sum is 44.

The square root of 66486419 is about 8153.9204680939. The cubic root of 66486419 is about 405.1143689600.

The spelling of 66486419 in words is "sixty-six million, four hundred eighty-six thousand, four hundred nineteen".