66284669 has 8 divisors (see below), whose sum is σ = 72595008. Its totient is φ = 60021760.

The previous prime is 66284663. The next prime is 66284693. The reversal of 66284669 is 96648266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66284669 - 2¹⁶ = 66219133 is a prime.

It is a super-2 number, since 2×66284669² = 8787314688879122, 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 (66284663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8897 + ... + 14550.

It is an arithmetic number, because the mean of its divisors is an integer number (9074376).

Almost surely, 2^66284669 is an apocalyptic number.

It is an amenable number.

66284669 is a deficient number, since it is larger than the sum of its proper divisors (6310339).

66284669 is a wasteful number, since it uses less digits than its factorization.

66284669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23715.

The product of its digits is 746496, while the sum is 47.

The square root of 66284669 is about 8141.5397192423. The cubic root of 66284669 is about 404.7041867739.

The spelling of 66284669 in words is "sixty-six million, two hundred eighty-four thousand, six hundred sixty-nine".