66486819 has 8 divisors (see below), whose sum is σ = 101313280. Its totient is φ = 37992456.

The previous prime is 66486799. The next prime is 66486851. The reversal of 66486819 is 91868466.

66486819 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 not a de Polignac number, because 66486819 - 2⁵ = 66486787 is a prime.

It is a super-2 number, since 2×66486819² = 8840994201477522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66486899) 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 7 ways as a sum of consecutive naturals, for example, 1582999 + ... + 1583040.

It is an arithmetic number, because the mean of its divisors is an integer number (12664160).

Almost surely, 2^66486819 is an apocalyptic number.

66486819 is a deficient number, since it is larger than the sum of its proper divisors (34826461).

66486819 is a wasteful number, since it uses less digits than its factorization.

66486819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3166049.

The product of its digits is 497664, while the sum is 48.

The square root of 66486819 is about 8153.9449961353. The cubic root of 66486819 is about 405.1151813837.

The spelling of 66486819 in words is "sixty-six million, four hundred eighty-six thousand, eight hundred nineteen".