66419369 has 4 divisors (see below), whose sum is σ = 66684240. Its totient is φ = 66154500.

The previous prime is 66419363. The next prime is 66419393. The reversal of 66419369 is 96391466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66419369 - 2¹² = 66415273 is a prime.

It is a super-2 number, since 2×66419369² = 8823065156716322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66419363) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 132059 + ... + 132560.

It is an arithmetic number, because the mean of its divisors is an integer number (16671060).

Almost surely, 2^66419369 is an apocalyptic number.

It is an amenable number.

66419369 is a deficient number, since it is larger than the sum of its proper divisors (264871).

66419369 is a wasteful number, since it uses less digits than its factorization.

66419369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264870.

The product of its digits is 209952, while the sum is 44.

The square root of 66419369 is about 8149.8079118468. The cubic root of 66419369 is about 404.9781403636.

The spelling of 66419369 in words is "sixty-six million, four hundred nineteen thousand, three hundred sixty-nine".