66504469 has 4 divisors (see below), whose sum is σ = 66568096. Its totient is φ = 66440844.

The previous prime is 66504467. The next prime is 66504479. The reversal of 66504469 is 96440566.

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 66504469 - 2¹ = 66504467 is a prime.

It is a super-2 number, since 2×66504469² = 8845688793943922, 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 (66504467) 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, 30219 + ... + 32344.

It is an arithmetic number, because the mean of its divisors is an integer number (16642024).

Almost surely, 2^66504469 is an apocalyptic number.

It is an amenable number.

66504469 is a deficient number, since it is larger than the sum of its proper divisors (63627).

66504469 is a wasteful number, since it uses less digits than its factorization.

66504469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63626.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 66504469 is about 8155.0272225174. The cubic root of 66504469 is about 405.1510263348.

The spelling of 66504469 in words is "sixty-six million, five hundred four thousand, four hundred sixty-nine".