66827469 has 4 divisors (see below), whose sum is σ = 89103296. Its totient is φ = 44551644.

The previous prime is 66827419. The next prime is 66827473. The reversal of 66827469 is 96472866.

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 not a de Polignac number, because 66827469 - 2¹² = 66823373 is a prime.

It is a super-2 number, since 2×66827469² = 8931821225891922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66827419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11137909 + ... + 11137914.

It is an arithmetic number, because the mean of its divisors is an integer number (22275824).

Almost surely, 2^66827469 is an apocalyptic number.

It is an amenable number.

66827469 is a deficient number, since it is larger than the sum of its proper divisors (22275827).

66827469 is a wasteful number, since it uses less digits than its factorization.

66827469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22275826.

The product of its digits is 870912, while the sum is 48.

The square root of 66827469 is about 8174.8069701981. The cubic root of 66827469 is about 405.8058820300.

The spelling of 66827469 in words is "sixty-six million, eight hundred twenty-seven thousand, four hundred sixty-nine".