66841419 has 4 divisors (see below), whose sum is σ = 89121896. Its totient is φ = 44560944.

The previous prime is 66841391. The next prime is 66841429. The reversal of 66841419 is 91414866.

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

It is not a de Polignac number, because 66841419 - 2⁸ = 66841163 is a prime.

It is a super-2 number, since 2×66841419² = 8935550587867122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66841429) by changing a digit.

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, 11140234 + ... + 11140239.

It is an arithmetic number, because the mean of its divisors is an integer number (22280474).

Almost surely, 2^66841419 is an apocalyptic number.

66841419 is a deficient number, since it is larger than the sum of its proper divisors (22280477).

66841419 is a wasteful number, since it uses less digits than its factorization.

66841419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22280476.

The product of its digits is 41472, while the sum is 39.

The square root of 66841419 is about 8175.6601568314. The cubic root of 66841419 is about 405.8341169175.

The spelling of 66841419 in words is "sixty-six million, eight hundred forty-one thousand, four hundred nineteen".